Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Linux for S/390 Lan Channel Station Network Driver |
3 | * | |
cbb2aec3 KDW |
4 | * Copyright IBM Corp. 1999, 2009 |
5 | * Author(s): Original Code written by | |
6 | * DJ Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com> | |
7 | * Rewritten by | |
8 | * Frank Pavlic <fpavlic@de.ibm.com> and | |
9 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
1da177e4 | 10 | * |
1da177e4 LT |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2, or (at your option) | |
14 | * any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
c99fc5da KW |
26 | #define KMSG_COMPONENT "lcs" |
27 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/if.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/trdevice.h> | |
34 | #include <linux/fddidevice.h> | |
35 | #include <linux/inetdevice.h> | |
36 | #include <linux/in.h> | |
37 | #include <linux/igmp.h> | |
38 | #include <linux/delay.h> | |
e5b5719b | 39 | #include <linux/kthread.h> |
5a0e3ad6 | 40 | #include <linux/slab.h> |
1da177e4 LT |
41 | #include <net/arp.h> |
42 | #include <net/ip.h> | |
43 | ||
44 | #include <asm/debug.h> | |
45 | #include <asm/idals.h> | |
46 | #include <asm/timex.h> | |
47 | #include <linux/device.h> | |
48 | #include <asm/ccwgroup.h> | |
49 | ||
50 | #include "lcs.h" | |
1da177e4 LT |
51 | |
52 | ||
53 | #if !defined(CONFIG_NET_ETHERNET) && \ | |
54 | !defined(CONFIG_TR) && !defined(CONFIG_FDDI) | |
55 | #error Cannot compile lcs.c without some net devices switched on. | |
56 | #endif | |
57 | ||
58 | /** | |
59 | * initialization string for output | |
60 | */ | |
1da177e4 | 61 | |
e018ba1f | 62 | static char version[] __initdata = "LCS driver"; |
0ca8cc6f UB |
63 | |
64 | /** | |
65 | * the root device for lcs group devices | |
66 | */ | |
67 | static struct device *lcs_root_dev; | |
1da177e4 LT |
68 | |
69 | /** | |
70 | * Some prototypes. | |
71 | */ | |
72 | static void lcs_tasklet(unsigned long); | |
4927b3f7 | 73 | static void lcs_start_kernel_thread(struct work_struct *); |
1da177e4 | 74 | static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); |
801599b0 | 75 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 | 76 | static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); |
801599b0 | 77 | #endif /* CONFIG_IP_MULTICAST */ |
27eb5ac8 | 78 | static int lcs_recovery(void *ptr); |
1da177e4 LT |
79 | |
80 | /** | |
81 | * Debug Facility Stuff | |
82 | */ | |
0ca8cc6f | 83 | static char debug_buffer[255]; |
1da177e4 LT |
84 | static debug_info_t *lcs_dbf_setup; |
85 | static debug_info_t *lcs_dbf_trace; | |
86 | ||
87 | /** | |
88 | * LCS Debug Facility functions | |
89 | */ | |
90 | static void | |
91 | lcs_unregister_debug_facility(void) | |
92 | { | |
93 | if (lcs_dbf_setup) | |
94 | debug_unregister(lcs_dbf_setup); | |
95 | if (lcs_dbf_trace) | |
96 | debug_unregister(lcs_dbf_trace); | |
97 | } | |
98 | ||
99 | static int | |
100 | lcs_register_debug_facility(void) | |
101 | { | |
66a464db | 102 | lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8); |
164b0fb1 | 103 | lcs_dbf_trace = debug_register("lcs_trace", 4, 1, 8); |
1da177e4 | 104 | if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { |
c99fc5da | 105 | pr_err("Not enough memory for debug facility.\n"); |
1da177e4 LT |
106 | lcs_unregister_debug_facility(); |
107 | return -ENOMEM; | |
108 | } | |
109 | debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); | |
0d613a27 | 110 | debug_set_level(lcs_dbf_setup, 2); |
1da177e4 | 111 | debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); |
0d613a27 | 112 | debug_set_level(lcs_dbf_trace, 2); |
1da177e4 LT |
113 | return 0; |
114 | } | |
115 | ||
116 | /** | |
117 | * Allocate io buffers. | |
118 | */ | |
119 | static int | |
120 | lcs_alloc_channel(struct lcs_channel *channel) | |
121 | { | |
122 | int cnt; | |
123 | ||
124 | LCS_DBF_TEXT(2, setup, "ichalloc"); | |
125 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
126 | /* alloc memory fo iobuffer */ | |
88abaab4 ES |
127 | channel->iob[cnt].data = |
128 | kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); | |
1da177e4 LT |
129 | if (channel->iob[cnt].data == NULL) |
130 | break; | |
9163bb2e | 131 | channel->iob[cnt].state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
132 | } |
133 | if (cnt < LCS_NUM_BUFFS) { | |
134 | /* Not all io buffers could be allocated. */ | |
135 | LCS_DBF_TEXT(2, setup, "echalloc"); | |
136 | while (cnt-- > 0) | |
137 | kfree(channel->iob[cnt].data); | |
138 | return -ENOMEM; | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
143 | /** | |
144 | * Free io buffers. | |
145 | */ | |
146 | static void | |
147 | lcs_free_channel(struct lcs_channel *channel) | |
148 | { | |
149 | int cnt; | |
150 | ||
151 | LCS_DBF_TEXT(2, setup, "ichfree"); | |
152 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
17fd682e | 153 | kfree(channel->iob[cnt].data); |
1da177e4 LT |
154 | channel->iob[cnt].data = NULL; |
155 | } | |
156 | } | |
157 | ||
158 | /* | |
159 | * Cleanup channel. | |
160 | */ | |
161 | static void | |
162 | lcs_cleanup_channel(struct lcs_channel *channel) | |
163 | { | |
164 | LCS_DBF_TEXT(3, setup, "cleanch"); | |
165 | /* Kill write channel tasklets. */ | |
166 | tasklet_kill(&channel->irq_tasklet); | |
167 | /* Free channel buffers. */ | |
168 | lcs_free_channel(channel); | |
169 | } | |
170 | ||
171 | /** | |
172 | * LCS free memory for card and channels. | |
173 | */ | |
174 | static void | |
175 | lcs_free_card(struct lcs_card *card) | |
176 | { | |
177 | LCS_DBF_TEXT(2, setup, "remcard"); | |
178 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
179 | kfree(card); | |
180 | } | |
181 | ||
182 | /** | |
183 | * LCS alloc memory for card and channels | |
184 | */ | |
185 | static struct lcs_card * | |
186 | lcs_alloc_card(void) | |
187 | { | |
188 | struct lcs_card *card; | |
189 | int rc; | |
190 | ||
191 | LCS_DBF_TEXT(2, setup, "alloclcs"); | |
192 | ||
88abaab4 | 193 | card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); |
1da177e4 LT |
194 | if (card == NULL) |
195 | return NULL; | |
1da177e4 LT |
196 | card->lan_type = LCS_FRAME_TYPE_AUTO; |
197 | card->pkt_seq = 0; | |
198 | card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; | |
199 | /* Allocate io buffers for the read channel. */ | |
200 | rc = lcs_alloc_channel(&card->read); | |
201 | if (rc){ | |
202 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
203 | lcs_free_card(card); | |
204 | return NULL; | |
205 | } | |
206 | /* Allocate io buffers for the write channel. */ | |
207 | rc = lcs_alloc_channel(&card->write); | |
208 | if (rc) { | |
209 | LCS_DBF_TEXT(2, setup, "iccwerr"); | |
210 | lcs_cleanup_channel(&card->read); | |
211 | lcs_free_card(card); | |
212 | return NULL; | |
213 | } | |
214 | ||
215 | #ifdef CONFIG_IP_MULTICAST | |
216 | INIT_LIST_HEAD(&card->ipm_list); | |
217 | #endif | |
218 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
219 | return card; | |
220 | } | |
221 | ||
222 | /* | |
223 | * Setup read channel. | |
224 | */ | |
225 | static void | |
226 | lcs_setup_read_ccws(struct lcs_card *card) | |
227 | { | |
228 | int cnt; | |
229 | ||
230 | LCS_DBF_TEXT(2, setup, "ireadccw"); | |
231 | /* Setup read ccws. */ | |
232 | memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); | |
233 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
234 | card->read.ccws[cnt].cmd_code = LCS_CCW_READ; | |
235 | card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; | |
236 | card->read.ccws[cnt].flags = | |
237 | CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; | |
238 | /* | |
239 | * Note: we have allocated the buffer with GFP_DMA, so | |
240 | * we do not need to do set_normalized_cda. | |
241 | */ | |
242 | card->read.ccws[cnt].cda = | |
243 | (__u32) __pa(card->read.iob[cnt].data); | |
244 | ((struct lcs_header *) | |
245 | card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; | |
246 | card->read.iob[cnt].callback = lcs_get_frames_cb; | |
9163bb2e | 247 | card->read.iob[cnt].state = LCS_BUF_STATE_READY; |
1da177e4 LT |
248 | card->read.iob[cnt].count = LCS_IOBUFFERSIZE; |
249 | } | |
250 | card->read.ccws[0].flags &= ~CCW_FLAG_PCI; | |
251 | card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; | |
252 | card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; | |
253 | /* Last ccw is a tic (transfer in channel). */ | |
254 | card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
255 | card->read.ccws[LCS_NUM_BUFFS].cda = | |
256 | (__u32) __pa(card->read.ccws); | |
257 | /* Setg initial state of the read channel. */ | |
9163bb2e | 258 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
259 | |
260 | card->read.io_idx = 0; | |
261 | card->read.buf_idx = 0; | |
262 | } | |
263 | ||
264 | static void | |
265 | lcs_setup_read(struct lcs_card *card) | |
266 | { | |
267 | LCS_DBF_TEXT(3, setup, "initread"); | |
268 | ||
269 | lcs_setup_read_ccws(card); | |
270 | /* Initialize read channel tasklet. */ | |
271 | card->read.irq_tasklet.data = (unsigned long) &card->read; | |
272 | card->read.irq_tasklet.func = lcs_tasklet; | |
273 | /* Initialize waitqueue. */ | |
274 | init_waitqueue_head(&card->read.wait_q); | |
275 | } | |
276 | ||
277 | /* | |
278 | * Setup write channel. | |
279 | */ | |
280 | static void | |
281 | lcs_setup_write_ccws(struct lcs_card *card) | |
282 | { | |
283 | int cnt; | |
284 | ||
285 | LCS_DBF_TEXT(3, setup, "iwritccw"); | |
286 | /* Setup write ccws. */ | |
287 | memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); | |
288 | for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { | |
289 | card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; | |
290 | card->write.ccws[cnt].count = 0; | |
291 | card->write.ccws[cnt].flags = | |
292 | CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; | |
293 | /* | |
294 | * Note: we have allocated the buffer with GFP_DMA, so | |
295 | * we do not need to do set_normalized_cda. | |
296 | */ | |
297 | card->write.ccws[cnt].cda = | |
298 | (__u32) __pa(card->write.iob[cnt].data); | |
299 | } | |
300 | /* Last ccw is a tic (transfer in channel). */ | |
301 | card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; | |
302 | card->write.ccws[LCS_NUM_BUFFS].cda = | |
303 | (__u32) __pa(card->write.ccws); | |
304 | /* Set initial state of the write channel. */ | |
9163bb2e | 305 | card->read.state = LCS_CH_STATE_INIT; |
1da177e4 LT |
306 | |
307 | card->write.io_idx = 0; | |
308 | card->write.buf_idx = 0; | |
309 | } | |
310 | ||
311 | static void | |
312 | lcs_setup_write(struct lcs_card *card) | |
313 | { | |
314 | LCS_DBF_TEXT(3, setup, "initwrit"); | |
315 | ||
316 | lcs_setup_write_ccws(card); | |
317 | /* Initialize write channel tasklet. */ | |
318 | card->write.irq_tasklet.data = (unsigned long) &card->write; | |
319 | card->write.irq_tasklet.func = lcs_tasklet; | |
320 | /* Initialize waitqueue. */ | |
321 | init_waitqueue_head(&card->write.wait_q); | |
322 | } | |
323 | ||
324 | static void | |
325 | lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) | |
326 | { | |
327 | unsigned long flags; | |
328 | ||
329 | spin_lock_irqsave(&card->mask_lock, flags); | |
330 | card->thread_allowed_mask = threads; | |
331 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
332 | wake_up(&card->wait_q); | |
333 | } | |
334 | static inline int | |
335 | lcs_threads_running(struct lcs_card *card, unsigned long threads) | |
336 | { | |
337 | unsigned long flags; | |
338 | int rc = 0; | |
339 | ||
340 | spin_lock_irqsave(&card->mask_lock, flags); | |
341 | rc = (card->thread_running_mask & threads); | |
342 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
343 | return rc; | |
344 | } | |
345 | ||
346 | static int | |
347 | lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) | |
348 | { | |
349 | return wait_event_interruptible(card->wait_q, | |
350 | lcs_threads_running(card, threads) == 0); | |
351 | } | |
352 | ||
353 | static inline int | |
354 | lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) | |
355 | { | |
356 | unsigned long flags; | |
357 | ||
358 | spin_lock_irqsave(&card->mask_lock, flags); | |
359 | if ( !(card->thread_allowed_mask & thread) || | |
360 | (card->thread_start_mask & thread) ) { | |
361 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
362 | return -EPERM; | |
363 | } | |
364 | card->thread_start_mask |= thread; | |
365 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static void | |
370 | lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) | |
371 | { | |
372 | unsigned long flags; | |
373 | ||
374 | spin_lock_irqsave(&card->mask_lock, flags); | |
375 | card->thread_running_mask &= ~thread; | |
376 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
377 | wake_up(&card->wait_q); | |
378 | } | |
379 | ||
380 | static inline int | |
381 | __lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
382 | { | |
383 | unsigned long flags; | |
384 | int rc = 0; | |
385 | ||
386 | spin_lock_irqsave(&card->mask_lock, flags); | |
387 | if (card->thread_start_mask & thread){ | |
388 | if ((card->thread_allowed_mask & thread) && | |
389 | !(card->thread_running_mask & thread)){ | |
390 | rc = 1; | |
391 | card->thread_start_mask &= ~thread; | |
392 | card->thread_running_mask |= thread; | |
393 | } else | |
394 | rc = -EPERM; | |
395 | } | |
396 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
397 | return rc; | |
398 | } | |
399 | ||
400 | static int | |
401 | lcs_do_run_thread(struct lcs_card *card, unsigned long thread) | |
402 | { | |
403 | int rc = 0; | |
404 | wait_event(card->wait_q, | |
405 | (rc = __lcs_do_run_thread(card, thread)) >= 0); | |
406 | return rc; | |
407 | } | |
408 | ||
409 | static int | |
410 | lcs_do_start_thread(struct lcs_card *card, unsigned long thread) | |
411 | { | |
412 | unsigned long flags; | |
413 | int rc = 0; | |
414 | ||
415 | spin_lock_irqsave(&card->mask_lock, flags); | |
416 | LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", | |
417 | (u8) card->thread_start_mask, | |
418 | (u8) card->thread_allowed_mask, | |
419 | (u8) card->thread_running_mask); | |
420 | rc = (card->thread_start_mask & thread); | |
421 | spin_unlock_irqrestore(&card->mask_lock, flags); | |
422 | return rc; | |
423 | } | |
424 | ||
425 | /** | |
426 | * Initialize channels,card and state machines. | |
427 | */ | |
428 | static void | |
429 | lcs_setup_card(struct lcs_card *card) | |
430 | { | |
431 | LCS_DBF_TEXT(2, setup, "initcard"); | |
432 | LCS_DBF_HEX(2, setup, &card, sizeof(void*)); | |
433 | ||
434 | lcs_setup_read(card); | |
435 | lcs_setup_write(card); | |
436 | /* Set cards initial state. */ | |
437 | card->state = DEV_STATE_DOWN; | |
438 | card->tx_buffer = NULL; | |
439 | card->tx_emitted = 0; | |
440 | ||
1da177e4 LT |
441 | init_waitqueue_head(&card->wait_q); |
442 | spin_lock_init(&card->lock); | |
443 | spin_lock_init(&card->ipm_lock); | |
444 | spin_lock_init(&card->mask_lock); | |
445 | #ifdef CONFIG_IP_MULTICAST | |
446 | INIT_LIST_HEAD(&card->ipm_list); | |
447 | #endif | |
448 | INIT_LIST_HEAD(&card->lancmd_waiters); | |
449 | } | |
450 | ||
451 | static inline void | |
452 | lcs_clear_multicast_list(struct lcs_card *card) | |
453 | { | |
454 | #ifdef CONFIG_IP_MULTICAST | |
455 | struct lcs_ipm_list *ipm; | |
456 | unsigned long flags; | |
457 | ||
458 | /* Free multicast list. */ | |
459 | LCS_DBF_TEXT(3, setup, "clmclist"); | |
460 | spin_lock_irqsave(&card->ipm_lock, flags); | |
461 | while (!list_empty(&card->ipm_list)){ | |
462 | ipm = list_entry(card->ipm_list.next, | |
463 | struct lcs_ipm_list, list); | |
464 | list_del(&ipm->list); | |
465 | if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ | |
466 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
467 | lcs_send_delipm(card, ipm); | |
468 | spin_lock_irqsave(&card->ipm_lock, flags); | |
469 | } | |
470 | kfree(ipm); | |
471 | } | |
472 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
473 | #endif | |
474 | } | |
475 | /** | |
476 | * Cleanup channels,card and state machines. | |
477 | */ | |
478 | static void | |
479 | lcs_cleanup_card(struct lcs_card *card) | |
480 | { | |
481 | ||
482 | LCS_DBF_TEXT(3, setup, "cleancrd"); | |
483 | LCS_DBF_HEX(2,setup,&card,sizeof(void*)); | |
484 | ||
485 | if (card->dev != NULL) | |
486 | free_netdev(card->dev); | |
487 | /* Cleanup channels. */ | |
488 | lcs_cleanup_channel(&card->write); | |
489 | lcs_cleanup_channel(&card->read); | |
490 | } | |
491 | ||
492 | /** | |
493 | * Start channel. | |
494 | */ | |
495 | static int | |
496 | lcs_start_channel(struct lcs_channel *channel) | |
497 | { | |
498 | unsigned long flags; | |
499 | int rc; | |
500 | ||
2a0217d5 | 501 | LCS_DBF_TEXT_(4, trace,"ssch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
502 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
503 | rc = ccw_device_start(channel->ccwdev, | |
504 | channel->ccws + channel->io_idx, 0, 0, | |
505 | DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); | |
506 | if (rc == 0) | |
9163bb2e | 507 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
508 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
509 | if (rc) { | |
2a0217d5 KS |
510 | LCS_DBF_TEXT_(4,trace,"essh%s", |
511 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
512 | dev_err(&channel->ccwdev->dev, |
513 | "Starting an LCS device resulted in an error," | |
514 | " rc=%d!\n", rc); | |
1da177e4 LT |
515 | } |
516 | return rc; | |
517 | } | |
518 | ||
519 | static int | |
520 | lcs_clear_channel(struct lcs_channel *channel) | |
521 | { | |
522 | unsigned long flags; | |
523 | int rc; | |
524 | ||
525 | LCS_DBF_TEXT(4,trace,"clearch"); | |
2a0217d5 | 526 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
527 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
528 | rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); | |
529 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
530 | if (rc) { | |
2a0217d5 KS |
531 | LCS_DBF_TEXT_(4, trace, "ecsc%s", |
532 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
533 | return rc; |
534 | } | |
9163bb2e UB |
535 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_CLEARED)); |
536 | channel->state = LCS_CH_STATE_STOPPED; | |
1da177e4 LT |
537 | return rc; |
538 | } | |
539 | ||
540 | ||
541 | /** | |
542 | * Stop channel. | |
543 | */ | |
544 | static int | |
545 | lcs_stop_channel(struct lcs_channel *channel) | |
546 | { | |
547 | unsigned long flags; | |
548 | int rc; | |
549 | ||
9163bb2e | 550 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
551 | return 0; |
552 | LCS_DBF_TEXT(4,trace,"haltsch"); | |
2a0217d5 | 553 | LCS_DBF_TEXT_(4, trace, "%s", dev_name(&channel->ccwdev->dev)); |
9163bb2e | 554 | channel->state = LCS_CH_STATE_INIT; |
1da177e4 LT |
555 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
556 | rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); | |
557 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
558 | if (rc) { | |
2a0217d5 KS |
559 | LCS_DBF_TEXT_(4, trace, "ehsc%s", |
560 | dev_name(&channel->ccwdev->dev)); | |
1da177e4 LT |
561 | return rc; |
562 | } | |
563 | /* Asynchronous halt initialted. Wait for its completion. */ | |
9163bb2e | 564 | wait_event(channel->wait_q, (channel->state == LCS_CH_STATE_HALTED)); |
1da177e4 LT |
565 | lcs_clear_channel(channel); |
566 | return 0; | |
567 | } | |
568 | ||
569 | /** | |
570 | * start read and write channel | |
571 | */ | |
572 | static int | |
573 | lcs_start_channels(struct lcs_card *card) | |
574 | { | |
575 | int rc; | |
576 | ||
577 | LCS_DBF_TEXT(2, trace, "chstart"); | |
578 | /* start read channel */ | |
579 | rc = lcs_start_channel(&card->read); | |
580 | if (rc) | |
581 | return rc; | |
582 | /* start write channel */ | |
583 | rc = lcs_start_channel(&card->write); | |
584 | if (rc) | |
585 | lcs_stop_channel(&card->read); | |
586 | return rc; | |
587 | } | |
588 | ||
589 | /** | |
590 | * stop read and write channel | |
591 | */ | |
592 | static int | |
593 | lcs_stop_channels(struct lcs_card *card) | |
594 | { | |
595 | LCS_DBF_TEXT(2, trace, "chhalt"); | |
596 | lcs_stop_channel(&card->read); | |
597 | lcs_stop_channel(&card->write); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | /** | |
602 | * Get empty buffer. | |
603 | */ | |
604 | static struct lcs_buffer * | |
605 | __lcs_get_buffer(struct lcs_channel *channel) | |
606 | { | |
607 | int index; | |
608 | ||
609 | LCS_DBF_TEXT(5, trace, "_getbuff"); | |
610 | index = channel->io_idx; | |
611 | do { | |
9163bb2e UB |
612 | if (channel->iob[index].state == LCS_BUF_STATE_EMPTY) { |
613 | channel->iob[index].state = LCS_BUF_STATE_LOCKED; | |
1da177e4 LT |
614 | return channel->iob + index; |
615 | } | |
616 | index = (index + 1) & (LCS_NUM_BUFFS - 1); | |
617 | } while (index != channel->io_idx); | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | static struct lcs_buffer * | |
622 | lcs_get_buffer(struct lcs_channel *channel) | |
623 | { | |
624 | struct lcs_buffer *buffer; | |
625 | unsigned long flags; | |
626 | ||
627 | LCS_DBF_TEXT(5, trace, "getbuff"); | |
628 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
629 | buffer = __lcs_get_buffer(channel); | |
630 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
631 | return buffer; | |
632 | } | |
633 | ||
634 | /** | |
635 | * Resume channel program if the channel is suspended. | |
636 | */ | |
637 | static int | |
638 | __lcs_resume_channel(struct lcs_channel *channel) | |
639 | { | |
640 | int rc; | |
641 | ||
9163bb2e | 642 | if (channel->state != LCS_CH_STATE_SUSPENDED) |
1da177e4 LT |
643 | return 0; |
644 | if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) | |
645 | return 0; | |
2a0217d5 | 646 | LCS_DBF_TEXT_(5, trace, "rsch%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
647 | rc = ccw_device_resume(channel->ccwdev); |
648 | if (rc) { | |
2a0217d5 KS |
649 | LCS_DBF_TEXT_(4, trace, "ersc%s", |
650 | dev_name(&channel->ccwdev->dev)); | |
c99fc5da KW |
651 | dev_err(&channel->ccwdev->dev, |
652 | "Sending data from the LCS device to the LAN failed" | |
653 | " with rc=%d\n",rc); | |
1da177e4 | 654 | } else |
9163bb2e | 655 | channel->state = LCS_CH_STATE_RUNNING; |
1da177e4 LT |
656 | return rc; |
657 | ||
658 | } | |
659 | ||
660 | /** | |
661 | * Make a buffer ready for processing. | |
662 | */ | |
663 | static inline void | |
664 | __lcs_ready_buffer_bits(struct lcs_channel *channel, int index) | |
665 | { | |
666 | int prev, next; | |
667 | ||
668 | LCS_DBF_TEXT(5, trace, "rdybits"); | |
669 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
670 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
671 | /* Check if we may clear the suspend bit of this buffer. */ | |
672 | if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { | |
673 | /* Check if we have to set the PCI bit. */ | |
674 | if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) | |
675 | /* Suspend bit of the previous buffer is not set. */ | |
676 | channel->ccws[index].flags |= CCW_FLAG_PCI; | |
677 | /* Suspend bit of the next buffer is set. */ | |
678 | channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; | |
679 | } | |
680 | } | |
681 | ||
682 | static int | |
683 | lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
684 | { | |
685 | unsigned long flags; | |
686 | int index, rc; | |
687 | ||
688 | LCS_DBF_TEXT(5, trace, "rdybuff"); | |
9163bb2e UB |
689 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
690 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 691 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 692 | buffer->state = LCS_BUF_STATE_READY; |
1da177e4 LT |
693 | index = buffer - channel->iob; |
694 | /* Set length. */ | |
695 | channel->ccws[index].count = buffer->count; | |
696 | /* Check relevant PCI/suspend bits. */ | |
697 | __lcs_ready_buffer_bits(channel, index); | |
698 | rc = __lcs_resume_channel(channel); | |
699 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
700 | return rc; | |
701 | } | |
702 | ||
703 | /** | |
704 | * Mark the buffer as processed. Take care of the suspend bit | |
705 | * of the previous buffer. This function is called from | |
706 | * interrupt context, so the lock must not be taken. | |
707 | */ | |
708 | static int | |
709 | __lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
710 | { | |
711 | int index, prev, next; | |
712 | ||
713 | LCS_DBF_TEXT(5, trace, "prcsbuff"); | |
9163bb2e UB |
714 | BUG_ON(buffer->state != LCS_BUF_STATE_READY); |
715 | buffer->state = LCS_BUF_STATE_PROCESSED; | |
1da177e4 LT |
716 | index = buffer - channel->iob; |
717 | prev = (index - 1) & (LCS_NUM_BUFFS - 1); | |
718 | next = (index + 1) & (LCS_NUM_BUFFS - 1); | |
719 | /* Set the suspend bit and clear the PCI bit of this buffer. */ | |
720 | channel->ccws[index].flags |= CCW_FLAG_SUSPEND; | |
721 | channel->ccws[index].flags &= ~CCW_FLAG_PCI; | |
722 | /* Check the suspend bit of the previous buffer. */ | |
9163bb2e | 723 | if (channel->iob[prev].state == LCS_BUF_STATE_READY) { |
1da177e4 LT |
724 | /* |
725 | * Previous buffer is in state ready. It might have | |
726 | * happened in lcs_ready_buffer that the suspend bit | |
727 | * has not been cleared to avoid an endless loop. | |
728 | * Do it now. | |
729 | */ | |
730 | __lcs_ready_buffer_bits(channel, prev); | |
731 | } | |
732 | /* Clear PCI bit of next buffer. */ | |
733 | channel->ccws[next].flags &= ~CCW_FLAG_PCI; | |
734 | return __lcs_resume_channel(channel); | |
735 | } | |
736 | ||
737 | /** | |
738 | * Put a processed buffer back to state empty. | |
739 | */ | |
740 | static void | |
741 | lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
742 | { | |
743 | unsigned long flags; | |
744 | ||
745 | LCS_DBF_TEXT(5, trace, "relbuff"); | |
9163bb2e UB |
746 | BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED && |
747 | buffer->state != LCS_BUF_STATE_PROCESSED); | |
1da177e4 | 748 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); |
9163bb2e | 749 | buffer->state = LCS_BUF_STATE_EMPTY; |
1da177e4 LT |
750 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); |
751 | } | |
752 | ||
753 | /** | |
754 | * Get buffer for a lan command. | |
755 | */ | |
756 | static struct lcs_buffer * | |
757 | lcs_get_lancmd(struct lcs_card *card, int count) | |
758 | { | |
759 | struct lcs_buffer *buffer; | |
760 | struct lcs_cmd *cmd; | |
761 | ||
762 | LCS_DBF_TEXT(4, trace, "getlncmd"); | |
763 | /* Get buffer and wait if none is available. */ | |
764 | wait_event(card->write.wait_q, | |
765 | ((buffer = lcs_get_buffer(&card->write)) != NULL)); | |
766 | count += sizeof(struct lcs_header); | |
767 | *(__u16 *)(buffer->data + count) = 0; | |
768 | buffer->count = count + sizeof(__u16); | |
769 | buffer->callback = lcs_release_buffer; | |
770 | cmd = (struct lcs_cmd *) buffer->data; | |
771 | cmd->offset = count; | |
772 | cmd->type = LCS_FRAME_TYPE_CONTROL; | |
773 | cmd->slot = 0; | |
774 | return buffer; | |
775 | } | |
776 | ||
777 | ||
778 | static void | |
779 | lcs_get_reply(struct lcs_reply *reply) | |
780 | { | |
781 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
782 | atomic_inc(&reply->refcnt); | |
783 | } | |
784 | ||
785 | static void | |
786 | lcs_put_reply(struct lcs_reply *reply) | |
787 | { | |
788 | WARN_ON(atomic_read(&reply->refcnt) <= 0); | |
789 | if (atomic_dec_and_test(&reply->refcnt)) { | |
790 | kfree(reply); | |
791 | } | |
792 | ||
793 | } | |
794 | ||
795 | static struct lcs_reply * | |
796 | lcs_alloc_reply(struct lcs_cmd *cmd) | |
797 | { | |
798 | struct lcs_reply *reply; | |
799 | ||
800 | LCS_DBF_TEXT(4, trace, "getreply"); | |
801 | ||
88abaab4 | 802 | reply = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC); |
1da177e4 LT |
803 | if (!reply) |
804 | return NULL; | |
1da177e4 LT |
805 | atomic_set(&reply->refcnt,1); |
806 | reply->sequence_no = cmd->sequence_no; | |
807 | reply->received = 0; | |
808 | reply->rc = 0; | |
809 | init_waitqueue_head(&reply->wait_q); | |
810 | ||
811 | return reply; | |
812 | } | |
813 | ||
814 | /** | |
815 | * Notifier function for lancmd replies. Called from read irq. | |
816 | */ | |
817 | static void | |
818 | lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) | |
819 | { | |
820 | struct list_head *l, *n; | |
821 | struct lcs_reply *reply; | |
822 | ||
823 | LCS_DBF_TEXT(4, trace, "notiwait"); | |
824 | spin_lock(&card->lock); | |
825 | list_for_each_safe(l, n, &card->lancmd_waiters) { | |
826 | reply = list_entry(l, struct lcs_reply, list); | |
827 | if (reply->sequence_no == cmd->sequence_no) { | |
828 | lcs_get_reply(reply); | |
829 | list_del_init(&reply->list); | |
830 | if (reply->callback != NULL) | |
831 | reply->callback(card, cmd); | |
832 | reply->received = 1; | |
833 | reply->rc = cmd->return_code; | |
834 | wake_up(&reply->wait_q); | |
835 | lcs_put_reply(reply); | |
836 | break; | |
837 | } | |
838 | } | |
839 | spin_unlock(&card->lock); | |
840 | } | |
841 | ||
842 | /** | |
b595076a | 843 | * Emit buffer of a lan command. |
1da177e4 | 844 | */ |
2b67fc46 | 845 | static void |
1da177e4 LT |
846 | lcs_lancmd_timeout(unsigned long data) |
847 | { | |
848 | struct lcs_reply *reply, *list_reply, *r; | |
849 | unsigned long flags; | |
850 | ||
851 | LCS_DBF_TEXT(4, trace, "timeout"); | |
852 | reply = (struct lcs_reply *) data; | |
853 | spin_lock_irqsave(&reply->card->lock, flags); | |
854 | list_for_each_entry_safe(list_reply, r, | |
855 | &reply->card->lancmd_waiters,list) { | |
856 | if (reply == list_reply) { | |
857 | lcs_get_reply(reply); | |
858 | list_del_init(&reply->list); | |
859 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
860 | reply->received = 1; | |
861 | reply->rc = -ETIME; | |
862 | wake_up(&reply->wait_q); | |
863 | lcs_put_reply(reply); | |
864 | return; | |
865 | } | |
866 | } | |
867 | spin_unlock_irqrestore(&reply->card->lock, flags); | |
868 | } | |
869 | ||
870 | static int | |
871 | lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, | |
872 | void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) | |
873 | { | |
874 | struct lcs_reply *reply; | |
875 | struct lcs_cmd *cmd; | |
876 | struct timer_list timer; | |
877 | unsigned long flags; | |
878 | int rc; | |
879 | ||
880 | LCS_DBF_TEXT(4, trace, "sendcmd"); | |
881 | cmd = (struct lcs_cmd *) buffer->data; | |
882 | cmd->return_code = 0; | |
883 | cmd->sequence_no = card->sequence_no++; | |
884 | reply = lcs_alloc_reply(cmd); | |
885 | if (!reply) | |
886 | return -ENOMEM; | |
887 | reply->callback = reply_callback; | |
888 | reply->card = card; | |
889 | spin_lock_irqsave(&card->lock, flags); | |
890 | list_add_tail(&reply->list, &card->lancmd_waiters); | |
891 | spin_unlock_irqrestore(&card->lock, flags); | |
892 | ||
893 | buffer->callback = lcs_release_buffer; | |
894 | rc = lcs_ready_buffer(&card->write, buffer); | |
895 | if (rc) | |
896 | return rc; | |
d62e09e3 | 897 | init_timer_on_stack(&timer); |
1da177e4 LT |
898 | timer.function = lcs_lancmd_timeout; |
899 | timer.data = (unsigned long) reply; | |
900 | timer.expires = jiffies + HZ*card->lancmd_timeout; | |
901 | add_timer(&timer); | |
902 | wait_event(reply->wait_q, reply->received); | |
903 | del_timer_sync(&timer); | |
904 | LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); | |
905 | rc = reply->rc; | |
906 | lcs_put_reply(reply); | |
907 | return rc ? -EIO : 0; | |
908 | } | |
909 | ||
910 | /** | |
911 | * LCS startup command | |
912 | */ | |
913 | static int | |
914 | lcs_send_startup(struct lcs_card *card, __u8 initiator) | |
915 | { | |
916 | struct lcs_buffer *buffer; | |
917 | struct lcs_cmd *cmd; | |
918 | ||
919 | LCS_DBF_TEXT(2, trace, "startup"); | |
920 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
921 | cmd = (struct lcs_cmd *) buffer->data; | |
922 | cmd->cmd_code = LCS_CMD_STARTUP; | |
923 | cmd->initiator = initiator; | |
924 | cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; | |
925 | return lcs_send_lancmd(card, buffer, NULL); | |
926 | } | |
927 | ||
928 | /** | |
929 | * LCS shutdown command | |
930 | */ | |
931 | static int | |
932 | lcs_send_shutdown(struct lcs_card *card) | |
933 | { | |
934 | struct lcs_buffer *buffer; | |
935 | struct lcs_cmd *cmd; | |
936 | ||
937 | LCS_DBF_TEXT(2, trace, "shutdown"); | |
938 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
939 | cmd = (struct lcs_cmd *) buffer->data; | |
940 | cmd->cmd_code = LCS_CMD_SHUTDOWN; | |
941 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
942 | return lcs_send_lancmd(card, buffer, NULL); | |
943 | } | |
944 | ||
945 | /** | |
946 | * LCS lanstat command | |
947 | */ | |
948 | static void | |
949 | __lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
950 | { | |
951 | LCS_DBF_TEXT(2, trace, "statcb"); | |
952 | memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); | |
953 | } | |
954 | ||
955 | static int | |
956 | lcs_send_lanstat(struct lcs_card *card) | |
957 | { | |
958 | struct lcs_buffer *buffer; | |
959 | struct lcs_cmd *cmd; | |
960 | ||
961 | LCS_DBF_TEXT(2,trace, "cmdstat"); | |
962 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
963 | cmd = (struct lcs_cmd *) buffer->data; | |
964 | /* Setup lanstat command. */ | |
965 | cmd->cmd_code = LCS_CMD_LANSTAT; | |
966 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
967 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
968 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
969 | return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); | |
970 | } | |
971 | ||
972 | /** | |
973 | * send stoplan command | |
974 | */ | |
975 | static int | |
976 | lcs_send_stoplan(struct lcs_card *card, __u8 initiator) | |
977 | { | |
978 | struct lcs_buffer *buffer; | |
979 | struct lcs_cmd *cmd; | |
980 | ||
981 | LCS_DBF_TEXT(2, trace, "cmdstpln"); | |
982 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
983 | cmd = (struct lcs_cmd *) buffer->data; | |
984 | cmd->cmd_code = LCS_CMD_STOPLAN; | |
985 | cmd->initiator = initiator; | |
986 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
987 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
988 | return lcs_send_lancmd(card, buffer, NULL); | |
989 | } | |
990 | ||
991 | /** | |
992 | * send startlan command | |
993 | */ | |
994 | static void | |
995 | __lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
996 | { | |
997 | LCS_DBF_TEXT(2, trace, "srtlancb"); | |
998 | card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; | |
999 | card->portno = cmd->cmd.lcs_std_cmd.portno; | |
1000 | } | |
1001 | ||
1002 | static int | |
1003 | lcs_send_startlan(struct lcs_card *card, __u8 initiator) | |
1004 | { | |
1005 | struct lcs_buffer *buffer; | |
1006 | struct lcs_cmd *cmd; | |
1007 | ||
1008 | LCS_DBF_TEXT(2, trace, "cmdstaln"); | |
1009 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1010 | cmd = (struct lcs_cmd *) buffer->data; | |
1011 | cmd->cmd_code = LCS_CMD_STARTLAN; | |
1012 | cmd->initiator = initiator; | |
1013 | cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; | |
1014 | cmd->cmd.lcs_std_cmd.portno = card->portno; | |
1015 | return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); | |
1016 | } | |
1017 | ||
1018 | #ifdef CONFIG_IP_MULTICAST | |
1019 | /** | |
1020 | * send setipm command (Multicast) | |
1021 | */ | |
1022 | static int | |
1023 | lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1024 | { | |
1025 | struct lcs_buffer *buffer; | |
1026 | struct lcs_cmd *cmd; | |
1027 | ||
1028 | LCS_DBF_TEXT(2, trace, "cmdsetim"); | |
1029 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1030 | cmd = (struct lcs_cmd *) buffer->data; | |
1031 | cmd->cmd_code = LCS_CMD_SETIPM; | |
1032 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1033 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1034 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1035 | cmd->cmd.lcs_qipassist.version = 4; | |
1036 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1037 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1038 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1039 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1040 | return lcs_send_lancmd(card, buffer, NULL); | |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * send delipm command (Multicast) | |
1045 | */ | |
1046 | static int | |
1047 | lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) | |
1048 | { | |
1049 | struct lcs_buffer *buffer; | |
1050 | struct lcs_cmd *cmd; | |
1051 | ||
1052 | LCS_DBF_TEXT(2, trace, "cmddelim"); | |
1053 | buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); | |
1054 | cmd = (struct lcs_cmd *) buffer->data; | |
1055 | cmd->cmd_code = LCS_CMD_DELIPM; | |
1056 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1057 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1058 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1059 | cmd->cmd.lcs_qipassist.version = 4; | |
1060 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1061 | memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, | |
1062 | &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); | |
1063 | LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); | |
1064 | return lcs_send_lancmd(card, buffer, NULL); | |
1065 | } | |
1066 | ||
1067 | /** | |
1068 | * check if multicast is supported by LCS | |
1069 | */ | |
1070 | static void | |
1071 | __lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) | |
1072 | { | |
1073 | LCS_DBF_TEXT(2, trace, "chkmccb"); | |
1074 | card->ip_assists_supported = | |
1075 | cmd->cmd.lcs_qipassist.ip_assists_supported; | |
1076 | card->ip_assists_enabled = | |
1077 | cmd->cmd.lcs_qipassist.ip_assists_enabled; | |
1078 | } | |
1079 | ||
1080 | static int | |
1081 | lcs_check_multicast_support(struct lcs_card *card) | |
1082 | { | |
1083 | struct lcs_buffer *buffer; | |
1084 | struct lcs_cmd *cmd; | |
1085 | int rc; | |
1086 | ||
1087 | LCS_DBF_TEXT(2, trace, "cmdqipa"); | |
1088 | /* Send query ipassist. */ | |
1089 | buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); | |
1090 | cmd = (struct lcs_cmd *) buffer->data; | |
1091 | cmd->cmd_code = LCS_CMD_QIPASSIST; | |
1092 | cmd->initiator = LCS_INITIATOR_TCPIP; | |
1093 | cmd->cmd.lcs_qipassist.lan_type = card->lan_type; | |
1094 | cmd->cmd.lcs_qipassist.portno = card->portno; | |
1095 | cmd->cmd.lcs_qipassist.version = 4; | |
1096 | cmd->cmd.lcs_qipassist.num_ip_pairs = 1; | |
1097 | rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); | |
1098 | if (rc != 0) { | |
c99fc5da | 1099 | pr_err("Query IPAssist failed. Assuming unsupported!\n"); |
1da177e4 LT |
1100 | return -EOPNOTSUPP; |
1101 | } | |
1da177e4 LT |
1102 | if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) |
1103 | return 0; | |
1104 | return -EOPNOTSUPP; | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * set or del multicast address on LCS card | |
1109 | */ | |
1110 | static void | |
1111 | lcs_fix_multicast_list(struct lcs_card *card) | |
1112 | { | |
1113 | struct list_head failed_list; | |
1114 | struct lcs_ipm_list *ipm, *tmp; | |
1115 | unsigned long flags; | |
1116 | int rc; | |
1117 | ||
1118 | LCS_DBF_TEXT(4,trace, "fixipm"); | |
1119 | INIT_LIST_HEAD(&failed_list); | |
1120 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1121 | list_modified: | |
1122 | list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ | |
1123 | switch (ipm->ipm_state) { | |
1124 | case LCS_IPM_STATE_SET_REQUIRED: | |
1125 | /* del from ipm_list so noone else can tamper with | |
1126 | * this entry */ | |
1127 | list_del_init(&ipm->list); | |
1128 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1129 | rc = lcs_send_setipm(card, ipm); | |
1130 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1131 | if (rc) { | |
c99fc5da KW |
1132 | pr_info("Adding multicast address failed." |
1133 | " Table possibly full!\n"); | |
1da177e4 LT |
1134 | /* store ipm in failed list -> will be added |
1135 | * to ipm_list again, so a retry will be done | |
1136 | * during the next call of this function */ | |
1137 | list_add_tail(&ipm->list, &failed_list); | |
1138 | } else { | |
1139 | ipm->ipm_state = LCS_IPM_STATE_ON_CARD; | |
1140 | /* re-insert into ipm_list */ | |
1141 | list_add_tail(&ipm->list, &card->ipm_list); | |
1142 | } | |
1143 | goto list_modified; | |
1144 | case LCS_IPM_STATE_DEL_REQUIRED: | |
1145 | list_del(&ipm->list); | |
1146 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1147 | lcs_send_delipm(card, ipm); | |
1148 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1149 | kfree(ipm); | |
1150 | goto list_modified; | |
1151 | case LCS_IPM_STATE_ON_CARD: | |
1152 | break; | |
1153 | } | |
1154 | } | |
1155 | /* re-insert all entries from the failed_list into ipm_list */ | |
179e0917 AM |
1156 | list_for_each_entry_safe(ipm, tmp, &failed_list, list) |
1157 | list_move_tail(&ipm->list, &card->ipm_list); | |
1158 | ||
1da177e4 | 1159 | spin_unlock_irqrestore(&card->ipm_lock, flags); |
1da177e4 LT |
1160 | } |
1161 | ||
1162 | /** | |
1163 | * get mac address for the relevant Multicast address | |
1164 | */ | |
1165 | static void | |
5a5a852e | 1166 | lcs_get_mac_for_ipm(__be32 ipm, char *mac, struct net_device *dev) |
1da177e4 LT |
1167 | { |
1168 | LCS_DBF_TEXT(4,trace, "getmac"); | |
1169 | if (dev->type == ARPHRD_IEEE802_TR) | |
1170 | ip_tr_mc_map(ipm, mac); | |
1171 | else | |
1172 | ip_eth_mc_map(ipm, mac); | |
1173 | } | |
1174 | ||
1175 | /** | |
1176 | * function called by net device to handle multicast address relevant things | |
1177 | */ | |
1178 | static inline void | |
1179 | lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1180 | { | |
1181 | struct ip_mc_list *im4; | |
1182 | struct list_head *l; | |
1183 | struct lcs_ipm_list *ipm; | |
1184 | unsigned long flags; | |
1185 | char buf[MAX_ADDR_LEN]; | |
1186 | ||
1187 | LCS_DBF_TEXT(4, trace, "remmclst"); | |
1188 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1189 | list_for_each(l, &card->ipm_list) { | |
1190 | ipm = list_entry(l, struct lcs_ipm_list, list); | |
1191 | for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { | |
1192 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1193 | if ( (ipm->ipm.ip_addr == im4->multiaddr) && | |
1194 | (memcmp(buf, &ipm->ipm.mac_addr, | |
1195 | LCS_MAC_LENGTH) == 0) ) | |
1196 | break; | |
1197 | } | |
1198 | if (im4 == NULL) | |
1199 | ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; | |
1200 | } | |
1201 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1202 | } | |
1203 | ||
1204 | static inline struct lcs_ipm_list * | |
1205 | lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) | |
1206 | { | |
1207 | struct lcs_ipm_list *tmp, *ipm = NULL; | |
1208 | struct list_head *l; | |
1209 | unsigned long flags; | |
1210 | ||
1211 | LCS_DBF_TEXT(4, trace, "chkmcent"); | |
1212 | spin_lock_irqsave(&card->ipm_lock, flags); | |
1213 | list_for_each(l, &card->ipm_list) { | |
1214 | tmp = list_entry(l, struct lcs_ipm_list, list); | |
1215 | if ( (tmp->ipm.ip_addr == im4->multiaddr) && | |
1216 | (memcmp(buf, &tmp->ipm.mac_addr, | |
1217 | LCS_MAC_LENGTH) == 0) ) { | |
1218 | ipm = tmp; | |
1219 | break; | |
1220 | } | |
1221 | } | |
1222 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1223 | return ipm; | |
1224 | } | |
1225 | ||
1226 | static inline void | |
1227 | lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) | |
1228 | { | |
1229 | ||
1230 | struct ip_mc_list *im4; | |
1231 | struct lcs_ipm_list *ipm; | |
1232 | char buf[MAX_ADDR_LEN]; | |
1233 | unsigned long flags; | |
1234 | ||
1235 | LCS_DBF_TEXT(4, trace, "setmclst"); | |
1236 | for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { | |
1237 | lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); | |
1238 | ipm = lcs_check_addr_entry(card, im4, buf); | |
1239 | if (ipm != NULL) | |
1240 | continue; /* Address already in list. */ | |
ae57b20a | 1241 | ipm = kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); |
1da177e4 | 1242 | if (ipm == NULL) { |
c99fc5da KW |
1243 | pr_info("Not enough memory to add" |
1244 | " new multicast entry!\n"); | |
1da177e4 LT |
1245 | break; |
1246 | } | |
1da177e4 LT |
1247 | memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); |
1248 | ipm->ipm.ip_addr = im4->multiaddr; | |
1249 | ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; | |
1250 | spin_lock_irqsave(&card->ipm_lock, flags); | |
27eb5ac8 | 1251 | LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4); |
1da177e4 LT |
1252 | list_add(&ipm->list, &card->ipm_list); |
1253 | spin_unlock_irqrestore(&card->ipm_lock, flags); | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | static int | |
1258 | lcs_register_mc_addresses(void *data) | |
1259 | { | |
1260 | struct lcs_card *card; | |
1261 | struct in_device *in4_dev; | |
1262 | ||
1263 | card = (struct lcs_card *) data; | |
1da177e4 LT |
1264 | |
1265 | if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) | |
1266 | return 0; | |
1267 | LCS_DBF_TEXT(4, trace, "regmulti"); | |
1268 | ||
1269 | in4_dev = in_dev_get(card->dev); | |
1270 | if (in4_dev == NULL) | |
1271 | goto out; | |
1272 | read_lock(&in4_dev->mc_list_lock); | |
1273 | lcs_remove_mc_addresses(card,in4_dev); | |
1274 | lcs_set_mc_addresses(card, in4_dev); | |
1275 | read_unlock(&in4_dev->mc_list_lock); | |
1276 | in_dev_put(in4_dev); | |
1277 | ||
27eb5ac8 KW |
1278 | netif_carrier_off(card->dev); |
1279 | netif_tx_disable(card->dev); | |
1280 | wait_event(card->write.wait_q, | |
9163bb2e | 1281 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 | 1282 | lcs_fix_multicast_list(card); |
27eb5ac8 KW |
1283 | if (card->state == DEV_STATE_UP) { |
1284 | netif_carrier_on(card->dev); | |
1285 | netif_wake_queue(card->dev); | |
1286 | } | |
1da177e4 LT |
1287 | out: |
1288 | lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); | |
1289 | return 0; | |
1290 | } | |
801599b0 HC |
1291 | #endif /* CONFIG_IP_MULTICAST */ |
1292 | ||
1da177e4 LT |
1293 | /** |
1294 | * function called by net device to | |
1295 | * handle multicast address relevant things | |
1296 | */ | |
1297 | static void | |
1298 | lcs_set_multicast_list(struct net_device *dev) | |
1299 | { | |
801599b0 | 1300 | #ifdef CONFIG_IP_MULTICAST |
1da177e4 LT |
1301 | struct lcs_card *card; |
1302 | ||
1303 | LCS_DBF_TEXT(4, trace, "setmulti"); | |
ad660e2f | 1304 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1305 | |
e82b0f2c | 1306 | if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) |
1da177e4 | 1307 | schedule_work(&card->kernel_thread_starter); |
1da177e4 | 1308 | #endif /* CONFIG_IP_MULTICAST */ |
801599b0 | 1309 | } |
1da177e4 LT |
1310 | |
1311 | static long | |
1312 | lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) | |
1313 | { | |
1314 | if (!IS_ERR(irb)) | |
1315 | return 0; | |
1316 | ||
1317 | switch (PTR_ERR(irb)) { | |
1318 | case -EIO: | |
c99fc5da KW |
1319 | dev_warn(&cdev->dev, |
1320 | "An I/O-error occurred on the LCS device\n"); | |
1da177e4 LT |
1321 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1322 | LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); | |
1323 | break; | |
1324 | case -ETIMEDOUT: | |
c99fc5da KW |
1325 | dev_warn(&cdev->dev, |
1326 | "A command timed out on the LCS device\n"); | |
1da177e4 LT |
1327 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1328 | LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); | |
1329 | break; | |
1330 | default: | |
c99fc5da KW |
1331 | dev_warn(&cdev->dev, |
1332 | "An error occurred on the LCS device, rc=%ld\n", | |
1333 | PTR_ERR(irb)); | |
1da177e4 LT |
1334 | LCS_DBF_TEXT(2, trace, "ckirberr"); |
1335 | LCS_DBF_TEXT(2, trace, " rc???"); | |
1336 | } | |
1337 | return PTR_ERR(irb); | |
1338 | } | |
1339 | ||
27eb5ac8 KW |
1340 | static int |
1341 | lcs_get_problem(struct ccw_device *cdev, struct irb *irb) | |
1342 | { | |
1343 | int dstat, cstat; | |
1344 | char *sense; | |
1345 | ||
1346 | sense = (char *) irb->ecw; | |
23d805b6 PO |
1347 | cstat = irb->scsw.cmd.cstat; |
1348 | dstat = irb->scsw.cmd.dstat; | |
27eb5ac8 KW |
1349 | |
1350 | if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | | |
1351 | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | | |
1352 | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { | |
1353 | LCS_DBF_TEXT(2, trace, "CGENCHK"); | |
1354 | return 1; | |
1355 | } | |
1356 | if (dstat & DEV_STAT_UNIT_CHECK) { | |
1357 | if (sense[LCS_SENSE_BYTE_1] & | |
1358 | LCS_SENSE_RESETTING_EVENT) { | |
1359 | LCS_DBF_TEXT(2, trace, "REVIND"); | |
1360 | return 1; | |
1361 | } | |
1362 | if (sense[LCS_SENSE_BYTE_0] & | |
1363 | LCS_SENSE_CMD_REJECT) { | |
1364 | LCS_DBF_TEXT(2, trace, "CMDREJ"); | |
1365 | return 0; | |
1366 | } | |
1367 | if ((!sense[LCS_SENSE_BYTE_0]) && | |
1368 | (!sense[LCS_SENSE_BYTE_1]) && | |
1369 | (!sense[LCS_SENSE_BYTE_2]) && | |
1370 | (!sense[LCS_SENSE_BYTE_3])) { | |
1371 | LCS_DBF_TEXT(2, trace, "ZEROSEN"); | |
1372 | return 0; | |
1373 | } | |
1374 | LCS_DBF_TEXT(2, trace, "DGENCHK"); | |
1375 | return 1; | |
1376 | } | |
1377 | return 0; | |
1378 | } | |
1379 | ||
2b67fc46 | 1380 | static void |
27eb5ac8 KW |
1381 | lcs_schedule_recovery(struct lcs_card *card) |
1382 | { | |
1383 | LCS_DBF_TEXT(2, trace, "startrec"); | |
1384 | if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD)) | |
1385 | schedule_work(&card->kernel_thread_starter); | |
1386 | } | |
1da177e4 LT |
1387 | |
1388 | /** | |
1389 | * IRQ Handler for LCS channels | |
1390 | */ | |
1391 | static void | |
1392 | lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) | |
1393 | { | |
1394 | struct lcs_card *card; | |
1395 | struct lcs_channel *channel; | |
27eb5ac8 KW |
1396 | int rc, index; |
1397 | int cstat, dstat; | |
1da177e4 LT |
1398 | |
1399 | if (lcs_check_irb_error(cdev, irb)) | |
1400 | return; | |
1401 | ||
1402 | card = CARD_FROM_DEV(cdev); | |
1403 | if (card->read.ccwdev == cdev) | |
1404 | channel = &card->read; | |
1405 | else | |
1406 | channel = &card->write; | |
1407 | ||
23d805b6 PO |
1408 | cstat = irb->scsw.cmd.cstat; |
1409 | dstat = irb->scsw.cmd.dstat; | |
2a0217d5 | 1410 | LCS_DBF_TEXT_(5, trace, "Rint%s", dev_name(&cdev->dev)); |
23d805b6 PO |
1411 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.cstat, |
1412 | irb->scsw.cmd.dstat); | |
1413 | LCS_DBF_TEXT_(5, trace, "%4x%4x", irb->scsw.cmd.fctl, | |
1414 | irb->scsw.cmd.actl); | |
1da177e4 | 1415 | |
27eb5ac8 KW |
1416 | /* Check for channel and device errors presented */ |
1417 | rc = lcs_get_problem(cdev, irb); | |
1418 | if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) { | |
c99fc5da KW |
1419 | dev_warn(&cdev->dev, |
1420 | "The LCS device stopped because of an error," | |
1421 | " dstat=0x%X, cstat=0x%X \n", | |
1422 | dstat, cstat); | |
27eb5ac8 | 1423 | if (rc) { |
59579da3 | 1424 | channel->state = LCS_CH_STATE_ERROR; |
27eb5ac8 KW |
1425 | } |
1426 | } | |
59579da3 KW |
1427 | if (channel->state == LCS_CH_STATE_ERROR) { |
1428 | lcs_schedule_recovery(card); | |
1429 | wake_up(&card->wait_q); | |
1430 | return; | |
1431 | } | |
1da177e4 | 1432 | /* How far in the ccw chain have we processed? */ |
9163bb2e | 1433 | if ((channel->state != LCS_CH_STATE_INIT) && |
9b3b9ab6 KW |
1434 | (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && |
1435 | (irb->scsw.cmd.cpa != 0)) { | |
23d805b6 | 1436 | index = (struct ccw1 *) __va((addr_t) irb->scsw.cmd.cpa) |
1da177e4 | 1437 | - channel->ccws; |
23d805b6 PO |
1438 | if ((irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) || |
1439 | (irb->scsw.cmd.cstat & SCHN_STAT_PCI)) | |
1da177e4 LT |
1440 | /* Bloody io subsystem tells us lies about cpa... */ |
1441 | index = (index - 1) & (LCS_NUM_BUFFS - 1); | |
1442 | while (channel->io_idx != index) { | |
1443 | __lcs_processed_buffer(channel, | |
1444 | channel->iob + channel->io_idx); | |
1445 | channel->io_idx = | |
1446 | (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1447 | } | |
1448 | } | |
1449 | ||
23d805b6 PO |
1450 | if ((irb->scsw.cmd.dstat & DEV_STAT_DEV_END) || |
1451 | (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) || | |
1452 | (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) | |
1da177e4 | 1453 | /* Mark channel as stopped. */ |
9163bb2e | 1454 | channel->state = LCS_CH_STATE_STOPPED; |
23d805b6 | 1455 | else if (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED) |
1da177e4 | 1456 | /* CCW execution stopped on a suspend bit. */ |
9163bb2e | 1457 | channel->state = LCS_CH_STATE_SUSPENDED; |
23d805b6 PO |
1458 | if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { |
1459 | if (irb->scsw.cmd.cc != 0) { | |
1da177e4 LT |
1460 | ccw_device_halt(channel->ccwdev, (addr_t) channel); |
1461 | return; | |
1462 | } | |
1463 | /* The channel has been stopped by halt_IO. */ | |
9163bb2e | 1464 | channel->state = LCS_CH_STATE_HALTED; |
1da177e4 | 1465 | } |
23d805b6 | 1466 | if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) |
9163bb2e | 1467 | channel->state = LCS_CH_STATE_CLEARED; |
1da177e4 LT |
1468 | /* Do the rest in the tasklet. */ |
1469 | tasklet_schedule(&channel->irq_tasklet); | |
1470 | } | |
1471 | ||
1472 | /** | |
1473 | * Tasklet for IRQ handler | |
1474 | */ | |
1475 | static void | |
1476 | lcs_tasklet(unsigned long data) | |
1477 | { | |
1478 | unsigned long flags; | |
1479 | struct lcs_channel *channel; | |
1480 | struct lcs_buffer *iob; | |
1481 | int buf_idx; | |
1482 | int rc; | |
1483 | ||
1484 | channel = (struct lcs_channel *) data; | |
2a0217d5 | 1485 | LCS_DBF_TEXT_(5, trace, "tlet%s", dev_name(&channel->ccwdev->dev)); |
1da177e4 LT |
1486 | |
1487 | /* Check for processed buffers. */ | |
1488 | iob = channel->iob; | |
1489 | buf_idx = channel->buf_idx; | |
9163bb2e | 1490 | while (iob[buf_idx].state == LCS_BUF_STATE_PROCESSED) { |
1da177e4 LT |
1491 | /* Do the callback thing. */ |
1492 | if (iob[buf_idx].callback != NULL) | |
1493 | iob[buf_idx].callback(channel, iob + buf_idx); | |
1494 | buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); | |
1495 | } | |
1496 | channel->buf_idx = buf_idx; | |
1497 | ||
9163bb2e | 1498 | if (channel->state == LCS_CH_STATE_STOPPED) |
1da177e4 LT |
1499 | // FIXME: what if rc != 0 ?? |
1500 | rc = lcs_start_channel(channel); | |
1501 | spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); | |
9163bb2e UB |
1502 | if (channel->state == LCS_CH_STATE_SUSPENDED && |
1503 | channel->iob[channel->io_idx].state == LCS_BUF_STATE_READY) { | |
1da177e4 LT |
1504 | // FIXME: what if rc != 0 ?? |
1505 | rc = __lcs_resume_channel(channel); | |
1506 | } | |
1507 | spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); | |
1508 | ||
1509 | /* Something happened on the channel. Wake up waiters. */ | |
1510 | wake_up(&channel->wait_q); | |
1511 | } | |
1512 | ||
1513 | /** | |
1514 | * Finish current tx buffer and make it ready for transmit. | |
1515 | */ | |
1516 | static void | |
1517 | __lcs_emit_txbuffer(struct lcs_card *card) | |
1518 | { | |
1519 | LCS_DBF_TEXT(5, trace, "emittx"); | |
1520 | *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; | |
1521 | card->tx_buffer->count += 2; | |
1522 | lcs_ready_buffer(&card->write, card->tx_buffer); | |
1523 | card->tx_buffer = NULL; | |
1524 | card->tx_emitted++; | |
1525 | } | |
1526 | ||
1527 | /** | |
1528 | * Callback for finished tx buffers. | |
1529 | */ | |
1530 | static void | |
1531 | lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1532 | { | |
1533 | struct lcs_card *card; | |
1534 | ||
1535 | LCS_DBF_TEXT(5, trace, "txbuffcb"); | |
1536 | /* Put buffer back to pool. */ | |
1537 | lcs_release_buffer(channel, buffer); | |
b385a144 | 1538 | card = container_of(channel, struct lcs_card, write); |
27eb5ac8 | 1539 | if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev)) |
0d613a27 | 1540 | netif_wake_queue(card->dev); |
1da177e4 LT |
1541 | spin_lock(&card->lock); |
1542 | card->tx_emitted--; | |
1543 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1544 | /* | |
1545 | * Last running tx buffer has finished. Submit partially | |
1546 | * filled current buffer. | |
1547 | */ | |
1548 | __lcs_emit_txbuffer(card); | |
1549 | spin_unlock(&card->lock); | |
1550 | } | |
1551 | ||
1552 | /** | |
1553 | * Packet transmit function called by network stack | |
1554 | */ | |
1555 | static int | |
1556 | __lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, | |
1557 | struct net_device *dev) | |
1558 | { | |
1559 | struct lcs_header *header; | |
ec634fe3 | 1560 | int rc = NETDEV_TX_OK; |
1da177e4 LT |
1561 | |
1562 | LCS_DBF_TEXT(5, trace, "hardxmit"); | |
1563 | if (skb == NULL) { | |
1564 | card->stats.tx_dropped++; | |
1565 | card->stats.tx_errors++; | |
ec634fe3 | 1566 | return NETDEV_TX_OK; |
1da177e4 LT |
1567 | } |
1568 | if (card->state != DEV_STATE_UP) { | |
1569 | dev_kfree_skb(skb); | |
1570 | card->stats.tx_dropped++; | |
1571 | card->stats.tx_errors++; | |
1572 | card->stats.tx_carrier_errors++; | |
ec634fe3 | 1573 | return NETDEV_TX_OK; |
1da177e4 | 1574 | } |
27eb5ac8 KW |
1575 | if (skb->protocol == htons(ETH_P_IPV6)) { |
1576 | dev_kfree_skb(skb); | |
ec634fe3 | 1577 | return NETDEV_TX_OK; |
27eb5ac8 | 1578 | } |
0d613a27 FP |
1579 | netif_stop_queue(card->dev); |
1580 | spin_lock(&card->lock); | |
1da177e4 LT |
1581 | if (card->tx_buffer != NULL && |
1582 | card->tx_buffer->count + sizeof(struct lcs_header) + | |
1583 | skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) | |
1584 | /* skb too big for current tx buffer. */ | |
1585 | __lcs_emit_txbuffer(card); | |
1586 | if (card->tx_buffer == NULL) { | |
1587 | /* Get new tx buffer */ | |
1588 | card->tx_buffer = lcs_get_buffer(&card->write); | |
1589 | if (card->tx_buffer == NULL) { | |
1590 | card->stats.tx_dropped++; | |
9e669d32 | 1591 | rc = NETDEV_TX_BUSY; |
0d613a27 | 1592 | goto out; |
1da177e4 LT |
1593 | } |
1594 | card->tx_buffer->callback = lcs_txbuffer_cb; | |
1595 | card->tx_buffer->count = 0; | |
1596 | } | |
1597 | header = (struct lcs_header *) | |
1598 | (card->tx_buffer->data + card->tx_buffer->count); | |
1599 | card->tx_buffer->count += skb->len + sizeof(struct lcs_header); | |
1600 | header->offset = card->tx_buffer->count; | |
1601 | header->type = card->lan_type; | |
1602 | header->slot = card->portno; | |
d626f62b | 1603 | skb_copy_from_linear_data(skb, header + 1, skb->len); |
0d613a27 | 1604 | spin_unlock(&card->lock); |
1da177e4 LT |
1605 | card->stats.tx_bytes += skb->len; |
1606 | card->stats.tx_packets++; | |
1607 | dev_kfree_skb(skb); | |
0d613a27 FP |
1608 | netif_wake_queue(card->dev); |
1609 | spin_lock(&card->lock); | |
1610 | if (card->tx_emitted <= 0 && card->tx_buffer != NULL) | |
1da177e4 LT |
1611 | /* If this is the first tx buffer emit it immediately. */ |
1612 | __lcs_emit_txbuffer(card); | |
0d613a27 FP |
1613 | out: |
1614 | spin_unlock(&card->lock); | |
1615 | return rc; | |
1da177e4 LT |
1616 | } |
1617 | ||
1618 | static int | |
1619 | lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1620 | { | |
1621 | struct lcs_card *card; | |
1622 | int rc; | |
1623 | ||
1624 | LCS_DBF_TEXT(5, trace, "pktxmit"); | |
ad660e2f | 1625 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 | 1626 | rc = __lcs_start_xmit(card, skb, dev); |
1da177e4 LT |
1627 | return rc; |
1628 | } | |
1629 | ||
1630 | /** | |
1631 | * send startlan and lanstat command to make LCS device ready | |
1632 | */ | |
1633 | static int | |
1634 | lcs_startlan_auto(struct lcs_card *card) | |
1635 | { | |
1636 | int rc; | |
1637 | ||
1638 | LCS_DBF_TEXT(2, trace, "strtauto"); | |
1639 | #ifdef CONFIG_NET_ETHERNET | |
1640 | card->lan_type = LCS_FRAME_TYPE_ENET; | |
1641 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1642 | if (rc == 0) | |
1643 | return 0; | |
1644 | ||
1645 | #endif | |
1646 | #ifdef CONFIG_TR | |
1647 | card->lan_type = LCS_FRAME_TYPE_TR; | |
1648 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1649 | if (rc == 0) | |
1650 | return 0; | |
1651 | #endif | |
1652 | #ifdef CONFIG_FDDI | |
1653 | card->lan_type = LCS_FRAME_TYPE_FDDI; | |
1654 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1655 | if (rc == 0) | |
1656 | return 0; | |
1657 | #endif | |
1658 | return -EIO; | |
1659 | } | |
1660 | ||
1661 | static int | |
1662 | lcs_startlan(struct lcs_card *card) | |
1663 | { | |
1664 | int rc, i; | |
1665 | ||
1666 | LCS_DBF_TEXT(2, trace, "startlan"); | |
1667 | rc = 0; | |
1668 | if (card->portno != LCS_INVALID_PORT_NO) { | |
1669 | if (card->lan_type == LCS_FRAME_TYPE_AUTO) | |
1670 | rc = lcs_startlan_auto(card); | |
1671 | else | |
1672 | rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); | |
1673 | } else { | |
1674 | for (i = 0; i <= 16; i++) { | |
1675 | card->portno = i; | |
1676 | if (card->lan_type != LCS_FRAME_TYPE_AUTO) | |
1677 | rc = lcs_send_startlan(card, | |
1678 | LCS_INITIATOR_TCPIP); | |
1679 | else | |
1680 | /* autodetecting lan type */ | |
1681 | rc = lcs_startlan_auto(card); | |
1682 | if (rc == 0) | |
1683 | break; | |
1684 | } | |
1685 | } | |
1686 | if (rc == 0) | |
1687 | return lcs_send_lanstat(card); | |
1688 | return rc; | |
1689 | } | |
1690 | ||
1691 | /** | |
1692 | * LCS detect function | |
1693 | * setup channels and make them I/O ready | |
1694 | */ | |
1695 | static int | |
1696 | lcs_detect(struct lcs_card *card) | |
1697 | { | |
1698 | int rc = 0; | |
1699 | ||
1700 | LCS_DBF_TEXT(2, setup, "lcsdetct"); | |
1701 | /* start/reset card */ | |
1702 | if (card->dev) | |
1703 | netif_stop_queue(card->dev); | |
1704 | rc = lcs_stop_channels(card); | |
1705 | if (rc == 0) { | |
1706 | rc = lcs_start_channels(card); | |
1707 | if (rc == 0) { | |
1708 | rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); | |
1709 | if (rc == 0) | |
1710 | rc = lcs_startlan(card); | |
1711 | } | |
1712 | } | |
1713 | if (rc == 0) { | |
1714 | card->state = DEV_STATE_UP; | |
1715 | } else { | |
1716 | card->state = DEV_STATE_DOWN; | |
9163bb2e UB |
1717 | card->write.state = LCS_CH_STATE_INIT; |
1718 | card->read.state = LCS_CH_STATE_INIT; | |
1da177e4 LT |
1719 | } |
1720 | return rc; | |
1721 | } | |
1722 | ||
1da177e4 LT |
1723 | /** |
1724 | * LCS Stop card | |
1725 | */ | |
1726 | static int | |
1727 | lcs_stopcard(struct lcs_card *card) | |
1728 | { | |
1729 | int rc; | |
1730 | ||
1731 | LCS_DBF_TEXT(3, setup, "stopcard"); | |
1732 | ||
9163bb2e UB |
1733 | if (card->read.state != LCS_CH_STATE_STOPPED && |
1734 | card->write.state != LCS_CH_STATE_STOPPED && | |
59579da3 KW |
1735 | card->read.state != LCS_CH_STATE_ERROR && |
1736 | card->write.state != LCS_CH_STATE_ERROR && | |
1da177e4 LT |
1737 | card->state == DEV_STATE_UP) { |
1738 | lcs_clear_multicast_list(card); | |
1739 | rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); | |
1740 | rc = lcs_send_shutdown(card); | |
1741 | } | |
1742 | rc = lcs_stop_channels(card); | |
1743 | card->state = DEV_STATE_DOWN; | |
1744 | ||
1745 | return rc; | |
1746 | } | |
1747 | ||
1da177e4 LT |
1748 | /** |
1749 | * Kernel Thread helper functions for LGW initiated commands | |
1750 | */ | |
1751 | static void | |
4927b3f7 | 1752 | lcs_start_kernel_thread(struct work_struct *work) |
1da177e4 | 1753 | { |
4927b3f7 | 1754 | struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter); |
1da177e4 | 1755 | LCS_DBF_TEXT(5, trace, "krnthrd"); |
27eb5ac8 | 1756 | if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD)) |
e5b5719b | 1757 | kthread_run(lcs_recovery, card, "lcs_recover"); |
1da177e4 LT |
1758 | #ifdef CONFIG_IP_MULTICAST |
1759 | if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) | |
e5b5719b | 1760 | kthread_run(lcs_register_mc_addresses, card, "regipm"); |
1da177e4 LT |
1761 | #endif |
1762 | } | |
1763 | ||
1764 | /** | |
1765 | * Process control frames. | |
1766 | */ | |
1767 | static void | |
1768 | lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) | |
1769 | { | |
1770 | LCS_DBF_TEXT(5, trace, "getctrl"); | |
1771 | if (cmd->initiator == LCS_INITIATOR_LGW) { | |
1772 | switch(cmd->cmd_code) { | |
1773 | case LCS_CMD_STARTUP: | |
1da177e4 | 1774 | case LCS_CMD_STARTLAN: |
27eb5ac8 | 1775 | lcs_schedule_recovery(card); |
1da177e4 LT |
1776 | break; |
1777 | case LCS_CMD_STOPLAN: | |
c99fc5da KW |
1778 | pr_warning("Stoplan for %s initiated by LGW.\n", |
1779 | card->dev->name); | |
27eb5ac8 KW |
1780 | if (card->dev) |
1781 | netif_carrier_off(card->dev); | |
1da177e4 LT |
1782 | break; |
1783 | default: | |
6b648063 | 1784 | LCS_DBF_TEXT(5, trace, "noLGWcmd"); |
1da177e4 LT |
1785 | break; |
1786 | } | |
1787 | } else | |
1788 | lcs_notify_lancmd_waiters(card, cmd); | |
1789 | } | |
1790 | ||
1791 | /** | |
1792 | * Unpack network packet. | |
1793 | */ | |
1794 | static void | |
1795 | lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) | |
1796 | { | |
1797 | struct sk_buff *skb; | |
1798 | ||
1799 | LCS_DBF_TEXT(5, trace, "getskb"); | |
1800 | if (card->dev == NULL || | |
1801 | card->state != DEV_STATE_UP) | |
1802 | /* The card isn't up. Ignore the packet. */ | |
1803 | return; | |
1804 | ||
1805 | skb = dev_alloc_skb(skb_len); | |
1806 | if (skb == NULL) { | |
c99fc5da KW |
1807 | dev_err(&card->dev->dev, |
1808 | " Allocating a socket buffer to interface %s failed\n", | |
1da177e4 LT |
1809 | card->dev->name); |
1810 | card->stats.rx_dropped++; | |
1811 | return; | |
1812 | } | |
1da177e4 LT |
1813 | memcpy(skb_put(skb, skb_len), skb_data, skb_len); |
1814 | skb->protocol = card->lan_type_trans(skb, card->dev); | |
1815 | card->stats.rx_bytes += skb_len; | |
1816 | card->stats.rx_packets++; | |
93ad37d9 KW |
1817 | if (skb->protocol == htons(ETH_P_802_2)) |
1818 | *((__u32 *)skb->cb) = ++card->pkt_seq; | |
1da177e4 LT |
1819 | netif_rx(skb); |
1820 | } | |
1821 | ||
1822 | /** | |
1823 | * LCS main routine to get packets and lancmd replies from the buffers | |
1824 | */ | |
1825 | static void | |
1826 | lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) | |
1827 | { | |
1828 | struct lcs_card *card; | |
1829 | struct lcs_header *lcs_hdr; | |
1830 | __u16 offset; | |
1831 | ||
1832 | LCS_DBF_TEXT(5, trace, "lcsgtpkt"); | |
1833 | lcs_hdr = (struct lcs_header *) buffer->data; | |
1834 | if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { | |
1835 | LCS_DBF_TEXT(4, trace, "-eiogpkt"); | |
1836 | return; | |
1837 | } | |
b385a144 | 1838 | card = container_of(channel, struct lcs_card, read); |
1da177e4 LT |
1839 | offset = 0; |
1840 | while (lcs_hdr->offset != 0) { | |
1841 | if (lcs_hdr->offset <= 0 || | |
1842 | lcs_hdr->offset > LCS_IOBUFFERSIZE || | |
1843 | lcs_hdr->offset < offset) { | |
1844 | /* Offset invalid. */ | |
1845 | card->stats.rx_length_errors++; | |
1846 | card->stats.rx_errors++; | |
1847 | return; | |
1848 | } | |
1849 | /* What kind of frame is it? */ | |
1850 | if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) | |
1851 | /* Control frame. */ | |
1852 | lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); | |
1853 | else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || | |
1854 | lcs_hdr->type == LCS_FRAME_TYPE_TR || | |
1855 | lcs_hdr->type == LCS_FRAME_TYPE_FDDI) | |
1856 | /* Normal network packet. */ | |
1857 | lcs_get_skb(card, (char *)(lcs_hdr + 1), | |
1858 | lcs_hdr->offset - offset - | |
1859 | sizeof(struct lcs_header)); | |
1860 | else | |
1861 | /* Unknown frame type. */ | |
1862 | ; // FIXME: error message ? | |
1863 | /* Proceed to next frame. */ | |
1864 | offset = lcs_hdr->offset; | |
1865 | lcs_hdr->offset = LCS_ILLEGAL_OFFSET; | |
1866 | lcs_hdr = (struct lcs_header *) (buffer->data + offset); | |
1867 | } | |
1868 | /* The buffer is now empty. Make it ready again. */ | |
1869 | lcs_ready_buffer(&card->read, buffer); | |
1870 | } | |
1871 | ||
1872 | /** | |
1873 | * get network statistics for ifconfig and other user programs | |
1874 | */ | |
1875 | static struct net_device_stats * | |
1876 | lcs_getstats(struct net_device *dev) | |
1877 | { | |
1878 | struct lcs_card *card; | |
1879 | ||
1880 | LCS_DBF_TEXT(4, trace, "netstats"); | |
ad660e2f | 1881 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1882 | return &card->stats; |
1883 | } | |
1884 | ||
1885 | /** | |
1886 | * stop lcs device | |
1887 | * This function will be called by user doing ifconfig xxx down | |
1888 | */ | |
1889 | static int | |
1890 | lcs_stop_device(struct net_device *dev) | |
1891 | { | |
1892 | struct lcs_card *card; | |
1893 | int rc; | |
1894 | ||
1895 | LCS_DBF_TEXT(2, trace, "stopdev"); | |
ad660e2f | 1896 | card = (struct lcs_card *) dev->ml_priv; |
27eb5ac8 KW |
1897 | netif_carrier_off(dev); |
1898 | netif_tx_disable(dev); | |
1da177e4 | 1899 | dev->flags &= ~IFF_UP; |
27eb5ac8 | 1900 | wait_event(card->write.wait_q, |
9163bb2e | 1901 | (card->write.state != LCS_CH_STATE_RUNNING)); |
1da177e4 LT |
1902 | rc = lcs_stopcard(card); |
1903 | if (rc) | |
c99fc5da KW |
1904 | dev_err(&card->dev->dev, |
1905 | " Shutting down the LCS device failed\n "); | |
1da177e4 LT |
1906 | return rc; |
1907 | } | |
1908 | ||
1909 | /** | |
1910 | * start lcs device and make it runnable | |
1911 | * This function will be called by user doing ifconfig xxx up | |
1912 | */ | |
1913 | static int | |
1914 | lcs_open_device(struct net_device *dev) | |
1915 | { | |
1916 | struct lcs_card *card; | |
1917 | int rc; | |
1918 | ||
1919 | LCS_DBF_TEXT(2, trace, "opendev"); | |
ad660e2f | 1920 | card = (struct lcs_card *) dev->ml_priv; |
1da177e4 LT |
1921 | /* initialize statistics */ |
1922 | rc = lcs_detect(card); | |
1923 | if (rc) { | |
c99fc5da | 1924 | pr_err("Error in opening device!\n"); |
1da177e4 LT |
1925 | |
1926 | } else { | |
1927 | dev->flags |= IFF_UP; | |
27eb5ac8 | 1928 | netif_carrier_on(dev); |
1da177e4 LT |
1929 | netif_wake_queue(dev); |
1930 | card->state = DEV_STATE_UP; | |
1931 | } | |
1932 | return rc; | |
1933 | } | |
1934 | ||
1935 | /** | |
1936 | * show function for portno called by cat or similar things | |
1937 | */ | |
1938 | static ssize_t | |
3fd3c0a5 | 1939 | lcs_portno_show (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1940 | { |
1941 | struct lcs_card *card; | |
1942 | ||
dff59b64 | 1943 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1944 | |
1945 | if (!card) | |
1946 | return 0; | |
1947 | ||
1948 | return sprintf(buf, "%d\n", card->portno); | |
1949 | } | |
1950 | ||
1951 | /** | |
1952 | * store the value which is piped to file portno | |
1953 | */ | |
1954 | static ssize_t | |
3fd3c0a5 | 1955 | lcs_portno_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
1956 | { |
1957 | struct lcs_card *card; | |
1958 | int value; | |
1959 | ||
dff59b64 | 1960 | card = dev_get_drvdata(dev); |
1da177e4 LT |
1961 | |
1962 | if (!card) | |
1963 | return 0; | |
1964 | ||
1965 | sscanf(buf, "%u", &value); | |
1966 | /* TODO: sanity checks */ | |
1967 | card->portno = value; | |
1968 | ||
1969 | return count; | |
1970 | ||
1971 | } | |
1972 | ||
1973 | static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); | |
1974 | ||
0ca8cc6f UB |
1975 | const char *lcs_type[] = { |
1976 | "not a channel", | |
1977 | "2216 parallel", | |
1978 | "2216 channel", | |
1979 | "OSA LCS card", | |
1980 | "unknown channel type", | |
1981 | "unsupported channel type", | |
1982 | }; | |
1983 | ||
1da177e4 | 1984 | static ssize_t |
3fd3c0a5 | 1985 | lcs_type_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1986 | { |
1987 | struct ccwgroup_device *cgdev; | |
1988 | ||
1989 | cgdev = to_ccwgroupdev(dev); | |
1990 | if (!cgdev) | |
1991 | return -ENODEV; | |
1992 | ||
0ca8cc6f | 1993 | return sprintf(buf, "%s\n", lcs_type[cgdev->cdev[0]->id.driver_info]); |
1da177e4 LT |
1994 | } |
1995 | ||
1996 | static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); | |
1997 | ||
1998 | static ssize_t | |
3fd3c0a5 | 1999 | lcs_timeout_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
2000 | { |
2001 | struct lcs_card *card; | |
2002 | ||
dff59b64 | 2003 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2004 | |
2005 | return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; | |
2006 | } | |
2007 | ||
2008 | static ssize_t | |
3fd3c0a5 | 2009 | lcs_timeout_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
2010 | { |
2011 | struct lcs_card *card; | |
2012 | int value; | |
2013 | ||
dff59b64 | 2014 | card = dev_get_drvdata(dev); |
1da177e4 LT |
2015 | |
2016 | if (!card) | |
2017 | return 0; | |
2018 | ||
2019 | sscanf(buf, "%u", &value); | |
2020 | /* TODO: sanity checks */ | |
2021 | card->lancmd_timeout = value; | |
2022 | ||
2023 | return count; | |
2024 | ||
2025 | } | |
2026 | ||
2b67fc46 | 2027 | static DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); |
1da177e4 | 2028 | |
27eb5ac8 | 2029 | static ssize_t |
e82b0f2c | 2030 | lcs_dev_recover_store(struct device *dev, struct device_attribute *attr, |
27eb5ac8 KW |
2031 | const char *buf, size_t count) |
2032 | { | |
dff59b64 | 2033 | struct lcs_card *card = dev_get_drvdata(dev); |
27eb5ac8 KW |
2034 | char *tmp; |
2035 | int i; | |
2036 | ||
2037 | if (!card) | |
2038 | return -EINVAL; | |
2039 | if (card->state != DEV_STATE_UP) | |
2040 | return -EPERM; | |
2041 | i = simple_strtoul(buf, &tmp, 16); | |
2042 | if (i == 1) | |
2043 | lcs_schedule_recovery(card); | |
2044 | return count; | |
2045 | } | |
2046 | ||
2047 | static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store); | |
2048 | ||
1da177e4 LT |
2049 | static struct attribute * lcs_attrs[] = { |
2050 | &dev_attr_portno.attr, | |
2051 | &dev_attr_type.attr, | |
2052 | &dev_attr_lancmd_timeout.attr, | |
27eb5ac8 | 2053 | &dev_attr_recover.attr, |
1da177e4 LT |
2054 | NULL, |
2055 | }; | |
2056 | ||
2057 | static struct attribute_group lcs_attr_group = { | |
2058 | .attrs = lcs_attrs, | |
2059 | }; | |
2060 | ||
2061 | /** | |
2062 | * lcs_probe_device is called on establishing a new ccwgroup_device. | |
2063 | */ | |
2064 | static int | |
2065 | lcs_probe_device(struct ccwgroup_device *ccwgdev) | |
2066 | { | |
2067 | struct lcs_card *card; | |
2068 | int ret; | |
2069 | ||
2070 | if (!get_device(&ccwgdev->dev)) | |
2071 | return -ENODEV; | |
2072 | ||
2073 | LCS_DBF_TEXT(2, setup, "add_dev"); | |
2074 | card = lcs_alloc_card(); | |
2075 | if (!card) { | |
6b648063 | 2076 | LCS_DBF_TEXT_(2, setup, " rc%d", -ENOMEM); |
1da177e4 LT |
2077 | put_device(&ccwgdev->dev); |
2078 | return -ENOMEM; | |
2079 | } | |
2080 | ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2081 | if (ret) { | |
1da177e4 LT |
2082 | lcs_free_card(card); |
2083 | put_device(&ccwgdev->dev); | |
2084 | return ret; | |
2085 | } | |
dff59b64 | 2086 | dev_set_drvdata(&ccwgdev->dev, card); |
1da177e4 LT |
2087 | ccwgdev->cdev[0]->handler = lcs_irq; |
2088 | ccwgdev->cdev[1]->handler = lcs_irq; | |
27eb5ac8 | 2089 | card->gdev = ccwgdev; |
4927b3f7 | 2090 | INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread); |
27eb5ac8 KW |
2091 | card->thread_start_mask = 0; |
2092 | card->thread_allowed_mask = 0; | |
2093 | card->thread_running_mask = 0; | |
1da177e4 LT |
2094 | return 0; |
2095 | } | |
2096 | ||
2097 | static int | |
2098 | lcs_register_netdev(struct ccwgroup_device *ccwgdev) | |
2099 | { | |
2100 | struct lcs_card *card; | |
2101 | ||
2102 | LCS_DBF_TEXT(2, setup, "regnetdv"); | |
dff59b64 | 2103 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2104 | if (card->dev->reg_state != NETREG_UNINITIALIZED) |
2105 | return 0; | |
2106 | SET_NETDEV_DEV(card->dev, &ccwgdev->dev); | |
2107 | return register_netdev(card->dev); | |
2108 | } | |
2109 | ||
2110 | /** | |
2111 | * lcs_new_device will be called by setting the group device online. | |
2112 | */ | |
0e0b46d8 FB |
2113 | static const struct net_device_ops lcs_netdev_ops = { |
2114 | .ndo_open = lcs_open_device, | |
2115 | .ndo_stop = lcs_stop_device, | |
2116 | .ndo_get_stats = lcs_getstats, | |
2117 | .ndo_start_xmit = lcs_start_xmit, | |
2118 | }; | |
2119 | ||
2120 | static const struct net_device_ops lcs_mc_netdev_ops = { | |
2121 | .ndo_open = lcs_open_device, | |
2122 | .ndo_stop = lcs_stop_device, | |
2123 | .ndo_get_stats = lcs_getstats, | |
2124 | .ndo_start_xmit = lcs_start_xmit, | |
2125 | .ndo_set_multicast_list = lcs_set_multicast_list, | |
2126 | }; | |
1da177e4 LT |
2127 | |
2128 | static int | |
2129 | lcs_new_device(struct ccwgroup_device *ccwgdev) | |
2130 | { | |
2131 | struct lcs_card *card; | |
2132 | struct net_device *dev=NULL; | |
2133 | enum lcs_dev_states recover_state; | |
2134 | int rc; | |
2135 | ||
dff59b64 | 2136 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2137 | if (!card) |
2138 | return -ENODEV; | |
2139 | ||
2140 | LCS_DBF_TEXT(2, setup, "newdev"); | |
2141 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2142 | card->read.ccwdev = ccwgdev->cdev[0]; | |
2143 | card->write.ccwdev = ccwgdev->cdev[1]; | |
2144 | ||
2145 | recover_state = card->state; | |
d816d423 KDW |
2146 | rc = ccw_device_set_online(card->read.ccwdev); |
2147 | if (rc) | |
2148 | goto out_err; | |
2149 | rc = ccw_device_set_online(card->write.ccwdev); | |
2150 | if (rc) | |
2151 | goto out_werr; | |
1da177e4 LT |
2152 | |
2153 | LCS_DBF_TEXT(3, setup, "lcsnewdv"); | |
2154 | ||
2155 | lcs_setup_card(card); | |
2156 | rc = lcs_detect(card); | |
2157 | if (rc) { | |
2158 | LCS_DBF_TEXT(2, setup, "dtctfail"); | |
c99fc5da KW |
2159 | dev_err(&card->dev->dev, |
2160 | "Detecting a network adapter for LCS devices" | |
2161 | " failed with rc=%d (0x%x)\n", rc, rc); | |
1da177e4 LT |
2162 | lcs_stopcard(card); |
2163 | goto out; | |
2164 | } | |
2165 | if (card->dev) { | |
2166 | LCS_DBF_TEXT(2, setup, "samedev"); | |
2167 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2168 | goto netdev_out; | |
2169 | } | |
2170 | switch (card->lan_type) { | |
2171 | #ifdef CONFIG_NET_ETHERNET | |
2172 | case LCS_FRAME_TYPE_ENET: | |
2173 | card->lan_type_trans = eth_type_trans; | |
2174 | dev = alloc_etherdev(0); | |
2175 | break; | |
2176 | #endif | |
2177 | #ifdef CONFIG_TR | |
2178 | case LCS_FRAME_TYPE_TR: | |
2179 | card->lan_type_trans = tr_type_trans; | |
2180 | dev = alloc_trdev(0); | |
2181 | break; | |
2182 | #endif | |
2183 | #ifdef CONFIG_FDDI | |
2184 | case LCS_FRAME_TYPE_FDDI: | |
2185 | card->lan_type_trans = fddi_type_trans; | |
2186 | dev = alloc_fddidev(0); | |
2187 | break; | |
2188 | #endif | |
2189 | default: | |
2190 | LCS_DBF_TEXT(3, setup, "errinit"); | |
c99fc5da | 2191 | pr_err(" Initialization failed\n"); |
1da177e4 LT |
2192 | goto out; |
2193 | } | |
2194 | if (!dev) | |
2195 | goto out; | |
2196 | card->dev = dev; | |
ad660e2f | 2197 | card->dev->ml_priv = card; |
0e0b46d8 | 2198 | card->dev->netdev_ops = &lcs_netdev_ops; |
1da177e4 LT |
2199 | memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); |
2200 | #ifdef CONFIG_IP_MULTICAST | |
2201 | if (!lcs_check_multicast_support(card)) | |
0e0b46d8 | 2202 | card->dev->netdev_ops = &lcs_mc_netdev_ops; |
1da177e4 | 2203 | #endif |
b5f9d55b | 2204 | netdev_out: |
1da177e4 LT |
2205 | lcs_set_allowed_threads(card,0xffffffff); |
2206 | if (recover_state == DEV_STATE_RECOVER) { | |
2207 | lcs_set_multicast_list(card->dev); | |
2208 | card->dev->flags |= IFF_UP; | |
27eb5ac8 | 2209 | netif_carrier_on(card->dev); |
1da177e4 LT |
2210 | netif_wake_queue(card->dev); |
2211 | card->state = DEV_STATE_UP; | |
b5f9d55b | 2212 | } else { |
1da177e4 | 2213 | lcs_stopcard(card); |
b5f9d55b | 2214 | } |
1da177e4 | 2215 | |
b5f9d55b FP |
2216 | if (lcs_register_netdev(ccwgdev) != 0) |
2217 | goto out; | |
2218 | ||
2219 | /* Print out supported assists: IPv6 */ | |
c99fc5da KW |
2220 | pr_info("LCS device %s %s IPv6 support\n", card->dev->name, |
2221 | (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? | |
2222 | "with" : "without"); | |
b5f9d55b | 2223 | /* Print out supported assist: Multicast */ |
c99fc5da KW |
2224 | pr_info("LCS device %s %s Multicast support\n", card->dev->name, |
2225 | (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? | |
2226 | "with" : "without"); | |
1da177e4 LT |
2227 | return 0; |
2228 | out: | |
2229 | ||
1da177e4 | 2230 | ccw_device_set_offline(card->write.ccwdev); |
d816d423 KDW |
2231 | out_werr: |
2232 | ccw_device_set_offline(card->read.ccwdev); | |
2233 | out_err: | |
1da177e4 LT |
2234 | return -ENODEV; |
2235 | } | |
2236 | ||
2237 | /** | |
2238 | * lcs_shutdown_device, called when setting the group device offline. | |
2239 | */ | |
2240 | static int | |
27eb5ac8 | 2241 | __lcs_shutdown_device(struct ccwgroup_device *ccwgdev, int recovery_mode) |
1da177e4 LT |
2242 | { |
2243 | struct lcs_card *card; | |
2244 | enum lcs_dev_states recover_state; | |
2245 | int ret; | |
2246 | ||
2247 | LCS_DBF_TEXT(3, setup, "shtdndev"); | |
dff59b64 | 2248 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2249 | if (!card) |
2250 | return -ENODEV; | |
27eb5ac8 KW |
2251 | if (recovery_mode == 0) { |
2252 | lcs_set_allowed_threads(card, 0); | |
2253 | if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) | |
2254 | return -ERESTARTSYS; | |
2255 | } | |
1da177e4 LT |
2256 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); |
2257 | recover_state = card->state; | |
2258 | ||
2259 | ret = lcs_stop_device(card->dev); | |
2260 | ret = ccw_device_set_offline(card->read.ccwdev); | |
2261 | ret = ccw_device_set_offline(card->write.ccwdev); | |
2262 | if (recover_state == DEV_STATE_UP) { | |
2263 | card->state = DEV_STATE_RECOVER; | |
2264 | } | |
2265 | if (ret) | |
2266 | return ret; | |
2267 | return 0; | |
2268 | } | |
2269 | ||
27eb5ac8 KW |
2270 | static int |
2271 | lcs_shutdown_device(struct ccwgroup_device *ccwgdev) | |
2272 | { | |
2273 | return __lcs_shutdown_device(ccwgdev, 0); | |
2274 | } | |
2275 | ||
2276 | /** | |
2277 | * drive lcs recovery after startup and startlan initiated by Lan Gateway | |
2278 | */ | |
2279 | static int | |
2280 | lcs_recovery(void *ptr) | |
2281 | { | |
2282 | struct lcs_card *card; | |
2283 | struct ccwgroup_device *gdev; | |
2284 | int rc; | |
2285 | ||
2286 | card = (struct lcs_card *) ptr; | |
27eb5ac8 KW |
2287 | |
2288 | LCS_DBF_TEXT(4, trace, "recover1"); | |
2289 | if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD)) | |
2290 | return 0; | |
2291 | LCS_DBF_TEXT(4, trace, "recover2"); | |
2292 | gdev = card->gdev; | |
c99fc5da KW |
2293 | dev_warn(&gdev->dev, |
2294 | "A recovery process has been started for the LCS device\n"); | |
27eb5ac8 KW |
2295 | rc = __lcs_shutdown_device(gdev, 1); |
2296 | rc = lcs_new_device(gdev); | |
2297 | if (!rc) | |
c99fc5da KW |
2298 | pr_info("Device %s successfully recovered!\n", |
2299 | card->dev->name); | |
27eb5ac8 | 2300 | else |
c99fc5da KW |
2301 | pr_info("Device %s could not be recovered!\n", |
2302 | card->dev->name); | |
27eb5ac8 KW |
2303 | lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD); |
2304 | return 0; | |
2305 | } | |
2306 | ||
1da177e4 LT |
2307 | /** |
2308 | * lcs_remove_device, free buffers and card | |
2309 | */ | |
2310 | static void | |
2311 | lcs_remove_device(struct ccwgroup_device *ccwgdev) | |
2312 | { | |
2313 | struct lcs_card *card; | |
2314 | ||
dff59b64 | 2315 | card = dev_get_drvdata(&ccwgdev->dev); |
1da177e4 LT |
2316 | if (!card) |
2317 | return; | |
2318 | ||
1da177e4 LT |
2319 | LCS_DBF_TEXT(3, setup, "remdev"); |
2320 | LCS_DBF_HEX(3, setup, &card, sizeof(void*)); | |
2321 | if (ccwgdev->state == CCWGROUP_ONLINE) { | |
2322 | lcs_shutdown_device(ccwgdev); | |
2323 | } | |
2324 | if (card->dev) | |
2325 | unregister_netdev(card->dev); | |
2326 | sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); | |
2327 | lcs_cleanup_card(card); | |
2328 | lcs_free_card(card); | |
2329 | put_device(&ccwgdev->dev); | |
2330 | } | |
2331 | ||
cbb2aec3 KDW |
2332 | static int lcs_pm_suspend(struct lcs_card *card) |
2333 | { | |
2334 | if (card->dev) | |
2335 | netif_device_detach(card->dev); | |
2336 | lcs_set_allowed_threads(card, 0); | |
2337 | lcs_wait_for_threads(card, 0xffffffff); | |
2338 | if (card->state != DEV_STATE_DOWN) | |
2339 | __lcs_shutdown_device(card->gdev, 1); | |
2340 | return 0; | |
2341 | } | |
2342 | ||
2343 | static int lcs_pm_resume(struct lcs_card *card) | |
2344 | { | |
2345 | int rc = 0; | |
2346 | ||
2347 | if (card->state == DEV_STATE_RECOVER) | |
2348 | rc = lcs_new_device(card->gdev); | |
2349 | if (card->dev) | |
2350 | netif_device_attach(card->dev); | |
2351 | if (rc) { | |
2352 | dev_warn(&card->gdev->dev, "The lcs device driver " | |
2353 | "failed to recover the device\n"); | |
2354 | } | |
2355 | return rc; | |
2356 | } | |
2357 | ||
2358 | static int lcs_prepare(struct ccwgroup_device *gdev) | |
2359 | { | |
2360 | return 0; | |
2361 | } | |
2362 | ||
2363 | static void lcs_complete(struct ccwgroup_device *gdev) | |
2364 | { | |
2365 | return; | |
2366 | } | |
2367 | ||
2368 | static int lcs_freeze(struct ccwgroup_device *gdev) | |
2369 | { | |
2370 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2371 | return lcs_pm_suspend(card); | |
2372 | } | |
2373 | ||
2374 | static int lcs_thaw(struct ccwgroup_device *gdev) | |
2375 | { | |
2376 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2377 | return lcs_pm_resume(card); | |
2378 | } | |
2379 | ||
2380 | static int lcs_restore(struct ccwgroup_device *gdev) | |
2381 | { | |
2382 | struct lcs_card *card = dev_get_drvdata(&gdev->dev); | |
2383 | return lcs_pm_resume(card); | |
2384 | } | |
2385 | ||
0ca8cc6f UB |
2386 | static struct ccw_device_id lcs_ids[] = { |
2387 | {CCW_DEVICE(0x3088, 0x08), .driver_info = lcs_channel_type_parallel}, | |
2388 | {CCW_DEVICE(0x3088, 0x1f), .driver_info = lcs_channel_type_2216}, | |
2389 | {CCW_DEVICE(0x3088, 0x60), .driver_info = lcs_channel_type_osa2}, | |
2390 | {}, | |
2391 | }; | |
2392 | MODULE_DEVICE_TABLE(ccw, lcs_ids); | |
2393 | ||
2394 | static struct ccw_driver lcs_ccw_driver = { | |
2395 | .owner = THIS_MODULE, | |
2396 | .name = "lcs", | |
2397 | .ids = lcs_ids, | |
2398 | .probe = ccwgroup_probe_ccwdev, | |
2399 | .remove = ccwgroup_remove_ccwdev, | |
2400 | }; | |
2401 | ||
1da177e4 LT |
2402 | /** |
2403 | * LCS ccwgroup driver registration | |
2404 | */ | |
2405 | static struct ccwgroup_driver lcs_group_driver = { | |
2406 | .owner = THIS_MODULE, | |
2407 | .name = "lcs", | |
2408 | .max_slaves = 2, | |
2409 | .driver_id = 0xD3C3E2, | |
2410 | .probe = lcs_probe_device, | |
2411 | .remove = lcs_remove_device, | |
2412 | .set_online = lcs_new_device, | |
2413 | .set_offline = lcs_shutdown_device, | |
cbb2aec3 KDW |
2414 | .prepare = lcs_prepare, |
2415 | .complete = lcs_complete, | |
2416 | .freeze = lcs_freeze, | |
2417 | .thaw = lcs_thaw, | |
2418 | .restore = lcs_restore, | |
1da177e4 LT |
2419 | }; |
2420 | ||
0ca8cc6f UB |
2421 | static ssize_t |
2422 | lcs_driver_group_store(struct device_driver *ddrv, const char *buf, | |
2423 | size_t count) | |
2424 | { | |
2425 | int err; | |
2426 | err = ccwgroup_create_from_string(lcs_root_dev, | |
2427 | lcs_group_driver.driver_id, | |
2428 | &lcs_ccw_driver, 2, buf); | |
2429 | return err ? err : count; | |
2430 | } | |
2431 | ||
2432 | static DRIVER_ATTR(group, 0200, NULL, lcs_driver_group_store); | |
2433 | ||
2434 | static struct attribute *lcs_group_attrs[] = { | |
2435 | &driver_attr_group.attr, | |
2436 | NULL, | |
2437 | }; | |
2438 | ||
2439 | static struct attribute_group lcs_group_attr_group = { | |
2440 | .attrs = lcs_group_attrs, | |
2441 | }; | |
2442 | ||
302689ac | 2443 | static const struct attribute_group *lcs_group_attr_groups[] = { |
0ca8cc6f UB |
2444 | &lcs_group_attr_group, |
2445 | NULL, | |
2446 | }; | |
2447 | ||
1da177e4 LT |
2448 | /** |
2449 | * LCS Module/Kernel initialization function | |
2450 | */ | |
2451 | static int | |
2452 | __init lcs_init_module(void) | |
2453 | { | |
2454 | int rc; | |
2455 | ||
c99fc5da | 2456 | pr_info("Loading %s\n", version); |
1da177e4 LT |
2457 | rc = lcs_register_debug_facility(); |
2458 | LCS_DBF_TEXT(0, setup, "lcsinit"); | |
0ca8cc6f UB |
2459 | if (rc) |
2460 | goto out_err; | |
2461 | lcs_root_dev = root_device_register("lcs"); | |
2462 | rc = IS_ERR(lcs_root_dev) ? PTR_ERR(lcs_root_dev) : 0; | |
2463 | if (rc) | |
2464 | goto register_err; | |
2465 | rc = ccw_driver_register(&lcs_ccw_driver); | |
2466 | if (rc) | |
2467 | goto ccw_err; | |
2468 | lcs_group_driver.driver.groups = lcs_group_attr_groups; | |
2469 | rc = ccwgroup_driver_register(&lcs_group_driver); | |
2470 | if (rc) | |
2471 | goto ccwgroup_err; | |
1da177e4 | 2472 | return 0; |
0ca8cc6f UB |
2473 | |
2474 | ccwgroup_err: | |
2475 | ccw_driver_unregister(&lcs_ccw_driver); | |
2476 | ccw_err: | |
2477 | root_device_unregister(lcs_root_dev); | |
2478 | register_err: | |
2479 | lcs_unregister_debug_facility(); | |
2480 | out_err: | |
2481 | pr_err("Initializing the lcs device driver failed\n"); | |
2482 | return rc; | |
1da177e4 LT |
2483 | } |
2484 | ||
2485 | ||
2486 | /** | |
2487 | * LCS module cleanup function | |
2488 | */ | |
2489 | static void | |
2490 | __exit lcs_cleanup_module(void) | |
2491 | { | |
c99fc5da | 2492 | pr_info("Terminating lcs module.\n"); |
1da177e4 | 2493 | LCS_DBF_TEXT(0, trace, "cleanup"); |
0ca8cc6f UB |
2494 | driver_remove_file(&lcs_group_driver.driver, |
2495 | &driver_attr_group); | |
2496 | ccwgroup_driver_unregister(&lcs_group_driver); | |
2497 | ccw_driver_unregister(&lcs_ccw_driver); | |
2498 | root_device_unregister(lcs_root_dev); | |
1da177e4 LT |
2499 | lcs_unregister_debug_facility(); |
2500 | } | |
2501 | ||
2502 | module_init(lcs_init_module); | |
2503 | module_exit(lcs_cleanup_module); | |
2504 | ||
1387780f | 2505 | MODULE_AUTHOR("Frank Pavlic <fpavlic@de.ibm.com>"); |
1da177e4 LT |
2506 | MODULE_LICENSE("GPL"); |
2507 |